Weil-McLain SlimFit Commercial Condensing Gas Boiler Manual

®
Series 2
Models 1000 - 2000 MBH
Commercial Condensing
Gas-fired water boilers
Advanced Manual
Multiple boiler installation & settings + Single boiler advanced settings
This manual must only be used by a qualified heating installer/service technician. Read all instructions, including this manual and
all other information shipped with the boiler, before installing. Perform steps in the order given. Failure to comply could result in
severe personal injury, death or substantial property damage.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Contents
SlimFit Control — Advanced mode . . . . . . . . . 3
Multiple boiler installations . . . . . . . . . . . . . 6
Multiple boiler water piping . . . . . . . . . . . . . 8
Follow all instructions for installation,
start-up and servicing in the SlimFit
boiler manual.
Use this Advanced Manual for multiple
boiler installation guidelines and control
settings and for single boiler advanced
control settings.
Fast-Track Setup — Requirements by Boiler . . . 11
Fast-Track Setup — Steps . . . . . . . . . . . . . 12
Fast-Track Setup — The WIZARD . . . . . . . . . 13
Fast-Track Setup — Typical Application A . . . . 16
Fast-Track Setup — Typical Application B . . . . 18
Fast-Track Setup — Typical Application C . . . . 20
Fast-Track Setup — Typical Application D . . . . 22
Additional heat demand . . . . . . . . . . . . . . 24
Field wiring . . . . . . . . . . . . . . . . . . . . 25
Field wiring Schematic Diagram. . . . . . . . . . 26
Field wiring Ladder Diagram. . . . . . . . . . . . 28
HAZARD DEFINITIONS
The following defined terms are used throughout this manual
to bring attention to the presence of hazards of various risk
levels or to important information concerning the life of the
product.
Indicates presence of hazards that will cause
severe personal injury, death or substantial
property damage.
Indicates presence of hazards that can cause
severe personal injury, death or substantial
property damage.
Indicates presence of hazards that will or can
cause minor personal injury or property damage.
Indicates special instructions on installation,
operation or maintenance that are important
but not related to personal injury or property
damage.
Zoning with the SlimFit Control . . . . . . . . . . 38
IMPORTANT
Control operation and setup . . . . . . . . . . . . 40
THE OUTDOOR SENSOR SUPPLIED WITH THE
BOILER IS RECOMMENDED.
SlimFit Control — INITIAL SCREENS. . . . . . . . 42
Available control settings – Advance Mode . . . . 44
System Type presets . . . . . . . . . . . . . . . . 46
CONTRACTOR menus . . . . . . . . . . . . . . . . 47
BOILER SETTINGS menu . . . . . . . . . . . . . . 48
If the outdoor sensor is not used, the following changes must be made to control settings
during control setup:
TARGET ADJUST (in priority menus) must
be set either to NONE (constant supply temperature) or 0–10VDC (remote target).
WWSD must be set to OFF.
NETWORK SETTINGS menu. . . . . . . . . . . . . 49
ROTATION AND SEQUENCE . . . . . . . . . . . . . 50
Network Boiler PRIORITY menus . . . . . . . . . 53
Single Boiler PRIORITY menus . . . . . . . . . . . 55
ASSIGN INPUTS menu . . . . . . . . . . . . . . . 57
AUX PUMP/OUTPUT options . . . . . . . . . . . . 58
MAINTENANCE, DATE AND TIME menus . . . . . . 59
–2–
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
SlimFit Control — Advanced mode
SlimFit control setup
1. Set control parameters using the WIZARD option provided
on initial start-up or manually enter parameters using control
menus explained later in this manual.
2. See Fast-Track setup instructions beginning on page 11 for
example applications and minimum settings required (using
factory defaults).
3. This manual provides set-up information for a single-boiler
advanced settings and for all multiple boiler applications.
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Boiler Model and Altitude are critical settings. Failure to set
correctly could result in severe personal injury, death or substantial
property damage.
Temperature settings — You must ensure that the SlimFit
control is set for the proper water temperatures for the system.
Excessive water temperature can cause significant property damage in some applications.
Multi-temperature systems — If the heating system includes
circuits that require lower temperature water (radiant slab circuits, for example) as well as higher temperature circuits (DHW,
finned tube baseboard, etc.), it is recommended to protect lowtemperature circuits with limit controls that are wired to one of
the external limit circuits on the SlimFit boiler control. Failure
to provide regulation can result in substantial property damage.
SlimFit control overview
Basic Boiler Features:
s Easy configuration with WIZARD step-by-step setup including
on-screen help.
s BASIC boiler settings mode for streamlined menu navigation of
essential settings.
s Three customizable input/output pairs—use as a 3-Zone control
or a 3-Priority control.
s Configure outputs to control System Pumps or 120 VAC Auxiliary
equipment.
s System type presets simplify system temperature selection.
s 0-10VDC Input can modulate boiler firing rate or target.
s Integral outdoor reset with warm weather shutdown.
Advanced Boiler Features:
s ADVANCED boiler settings mode unlocks all features and customizable parameters.
s Manage multiple types of System Pumps or 120 VAC Auxiliary
accessories.
s Manage staged heating sources using the Additional Heat Demand
feature.
s BMS integration with MODBUS standard.
s
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Additional Heat Demand Features:
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(see next page for explanation of Priorities)
s
Create a network of up to eight (8) boilers using built-in controls.
Master boiler controls the modulation and sequencing of boilers
on the network to achieve desired system supply temperature.
Use ALL boiler inputs, not just the first and last boilers, up to 24
customizable inputs across boiler network (3 per unit, maximum
of eight (8) boilers on network).
Part number 550-100-190/0917
Provides contact and modulating output to activate other
boilers or heating sources (a SlimFit boiler collaborating
with a heat pump or a different boiler, for examples).
s Modulating output limited to 10VDC; 108μA.
Configure to operate additional heat demand functionality 1st (before SlimFit boiler) or 2nd (after SlimFit
boiler).
Select the response time that the primary source is allowed to function before the additional heat demand
activates the secondary source.
Switch between 1st and 2nd based on a set outdoor temperature for use in base loading applications.
Select if the additional heat source is activated based on
the system temperatures being monitored by the SlimFit
boiler (system temperature dependent YES).
SlimFit control operation
Multiple Boiler (Network) Features:
s
s
Two (2) available Network Priorities allow multiple
system types/temperature zones.
Direct-connected DHW tanks (or other heating zones)
can be piped and wired locally to any boiler in the system,
not just the first or the last.
Three system modulation types—SERIES, PARALLEL,
AND SMART.
Three (3) Lead boiler rotation modes (plus OFF).
Limit the firing rate for each Network Priority independently when heat demands are mismatched using the
Max System Rate parameter.
Fire multiple boilers at initial call for heat to start up
quickly for high demand applications using the Minimum Boilers parameter.
Won’t interrupt a Local heat demand (such as directconnected DHW tank) to satisfy Network heat demand
unless all available boilers are at maximum input.
Simple, 2-wire boiler-to-boiler communication connection.
s
The control responds to signals from:
s Room thermostats
s DHW aquastats (if used)
s Temperature sensors — boiler return, boiler supply,
flue temperature and, when used, system supply and
system return, outdoor temperature. For optimal
performance, it is recommended to install
the system supply and return sensors.
The control automatically adjusts blower speed (and gas
flow rate) to match boiler output to space heating and/
or DHW heating demand.
The control provides three inputs and three outputs (for
circulators or auxiliary devices) plus a boiler circulator
output.
Outdoor reset are recommended to be used in all application.
s The outdoor temperature is used for supply temperature reset operation and for the warm weather
shutdown (WWSD) option.
s See “Outdoor reset operation” on page 4 for complete
explanation of outdoor reset settings.
System presets
s The SlimFit control provides presets by System Type
(see Figure 25, page 46 for complete list).
–3–
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
SlimFit Control — ADVANCED mode
SlimFit control Priorities & Input/
Outputs
s
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For heating installations with multiple systems, the SlimFit
control uses PRIORITIES to determine the order of operation of the systems.
s The control’s MAX and MIN time settings determine the
maximum and minimum times a system will be operated before being turned off to allow another system to
operate.
s A typical example is DHW priority — heat demand from
the DHW system is given preference over space heating
if assigned to Priority 1.
Each PRIORITY has its own set of operating parameters.
s The control prompts the user to select the system type
(finned tube baseboard, DHW, etc.) and is factory
programmed with parameters suited to each of these
system types.
s The user can also choose CUSTOM to create a system
type.
The SlimFit control provides up to three PRIORITIES for
single boiler applications and up to four priorities for network boiler applications. The order of operation is:
s Single boilers: PRIORITY 1, PRIORITY 2, PRIORITY 3.
s Network boilers: LOCAL PRIORITY 1, NETWORK
PRIORITY 1, NETWORK PRIORITY 2, LOCAL PRIORITY 2.
s For each boiler in a network, this provides up to two
LOCAL priorities, used for heating systems piped directly
to the boiler, such as DHW tanks.
s NETWORK priorities are used for heating systems connected in the primary heating loop and supplied by the
boiler network.
Each boiler has three INPUT/OUTPUT pairs (INPUT/OUTPUT 1, 2 and 3).
s Control setup prompts the user to assign each of these
I/O pairs to a PRIORITY. The SlimFit control then knows
which system (priority) to operate when any input assigned to that priority receives a call for heat.
s The SlimFit controls respond to heat calls based on the
order of the assigned priorities and the timings set for
each priority’s operation.
Boiler circulator
s
s
The boiler circulator must be supplied by others.
The 120VAC Dry contact for the boiler circulator is located
on the boiler’s Expansion Module. For each of the priorities,
the control can be setup to run the boiler pump or to leave
it off. It is recommended to set Boiler Circulator to OFF for
directly piped DHW systems with its own circulator.
The boiler circulator must be installed and connected. Flow through the boiler must be provided
during all times of operation. Failure to do so can
result in severe personal injury, death or substantial
property damage.
–4–
(continued)
Multiple boiler operation
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The SlimFit boiler has an auto detection feature for multiple
boiler networks. The Master will automatically detect the
presence of the other boilers wired to the network.
There will be a 30 - 60 second period until the Master may
see the shadow boilers.
Each shadow boiler must be assigned a network address, from
2 through 8. The address for each boiler must be unique,
NOT selected for any other boiler.
Afterwards, the Master will build a network based on the
communications shared. If a boiler loses communication, the
Master will automatically re-assign the lost boiler to where
it was before once it is back on the network.
When network inputs turn on, the Master boiler will enter
the Network Modulation routine.
Using system sensors, the Master will modulate the entire
network to meet the energy requirements of Network Priority
1 and Network Priority 2 inputs when they are on.
When a Local Priority input becomes active (switch closes),
modulation for that input is not controlled by the Master,
but instead is left to that local boiler using its own local Boiler
Inlet and Outlet sensors.
Each of the three (3) inputs on the Master or any of the
Shadow boilers can be assigned as Network Priority 1 or 2
or assigned as Local Priority 1 or 2. Network Priority settings
are common across all the boilers. These Network Priority
settings can only be adjusted from the Master boiler.
Sequence of operation
s
Figure 21, page 40 is a summary of the operating sequence
for the SlimFit control.
s The statuses shown appear on the display as the SlimFit
control cycles the boiler.
s The display will display red (solid or flashing) if a problem has been detected.
Outdoor reset operation
1. Calculates target temperature for space heating zones based
on outdoor temperature.
2. For an explanation of the target temperatures and associated
outdoor temperatures, see Figure 1, page 5.
3. The temperature settings discussed below are accessed in
the priority menu for the applicable system. For detailed
explanations of the priority menus, see Figure 32, page 53.
SUPPLY MAX
1. Set SUPPLY MAX to the required supply water temperature
for the system at design maximum heat loss (typically 180°F
for finned tube baseboard on new installations).
SUPPLY MIN
1. SUPPLY MIN should equal the desired minimum supply
water temperature for the system.
2. This could be set as low as 70°F, which would supply “zero
heat” when outdoor temperature is 70°F, because supply
water temp would equal room temp.
3. See examples in Figure 1.
Part number 550-100-190/0917
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SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
SlimFit Control — ADVANCED mode
OD RESET MAX
1. OD RESET MAX means the outdoor temperature at which the
target temperature reaches its minimum (SUPPLY MIN).
2. In the examples of Figure 1, this occurs at 70 °F (the factory
default).
(continued)
Figure 1
Outdoor reset operation
Figure 2
Remote target operation
OD RESET MIN
1. OD RESET MIN means the outdoor temperature at which the
target temperature reaches its maximum value (SUPPLY MAX).
2. In the examples of Figure 1, this occurs at 0°F outside (the factory
default setting).
3. OD RESET MIN should equal the ODT (outdoor design temperature) for the installation’s location.
Remote target operation (0–10VDC input)
1. This function allows a remote analog input to regulate the supply temperature for control operation/modulation. This can be
done for any priority, including network and local priorities for
multiple boiler networks.
2. The settings discussed below are accessed in the priority menu
for the applicable system. For detailed explanations of the priority
menus, see Figure 32, page 53.
3. See Figure 2 for an explanation of target temperature vs voltage
when using remote target operation.
4. In the priority menu for the applicable system, select 0-10V for
the TARGET ADJUST setting.
5. In the same priority menu, select the VOLTS FOR MIN and VOLTS
FOR MAX values. VOLTS FOR MIN sets the voltage value for the
desired minimum supply temperature. VOLTS FOR MAX sets
the voltage value for the desired maximum supply temperature.
Remote modulation operation
(0–10VDC input) — Single boilers only
Using an external multiple boiler controller — Remote
modulation using an external controller only works with
each boiler set up as a SINGLE boiler in the SlimFit
Control setup.
1. Use this option for single boilers only. To use 0–10VDC for remote modulation, go to Contractor Menu -> Assign Inputs. Then
change Input 1’s source to 0–10V. The priority that is assigned to
Input 1 cannot not be used by any other Input.
2. The boiler comes on at 0.9VDC and turns off at 0.8VDC. 2 VDC
= 17% input. 10 VDC = 100% input. These voltage settings are
not adjustable.
Part number 550-100-190/0917
–5–
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Multiple boiler installations
Placing multiple boilers
1. Locate multiple boilers in boiler room
to provide the clearances shown in:
a. Figure 3 (side-to-side), or
b. Figure 5 (mirror-image mounting).
c. Other layouts can be used if all required clearances are maintained.
2. Provide indicated clearances around
boilers for access and servicing. If
recommended dimensions are not
possible, provide at least the minimum
clearances given in boiler manual. Also
follow local codes.
3. Construct boiler foundation if boiler
room floor is uneven or if there is a
danger of flooding. Size foundation
to allow for clearance and spacing
dimensions shown in either Figure 3
or Figure 5.
Verify that boiler placement and clearances comply with all applicable codes.
4. Chalk-line boiler locations on foundation or boiler room floor.
5. Uncrate, assemble and mount boilers according to instructions in this
manual.
6. Provide clearance for installation
of venting, air piping, gas piping,
condensate piping and components,
expansion tank, boiler pump and other
accessories.
Figure 3
Side-to-side mounting of multiple SlimFit boilers — LEFT-HAND boilers only
Figure 4
Side-to-side mounting of multiple SlimFit boilers — RIGHT-HAND boilers only
–6–
Part number 550-100-190/0917
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SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Multiple boiler installations
(continued)
Verify that boiler placement and clearances comply with all applicable codes.
Figure 5
Side-by-side installation of multiple SlimFit boilers (using left-hand and right-hand boilers together)
Part number 550-100-190/0917
–7–
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Multiple boiler water piping
Multiple boiler piping
1. Primary/secondary piping
a. Use primary/secondary piping, as shown on the following pages when flow rates are outside the ranges
shown in Figure 8, page 9.
b. Primary/secondary piping ensures flow only through
operating boilers.
2. Provide a flow/check valve in the supply piping of each
boiler as shown in piping diagrams in this manual. Install
an isolation valve on the supply and return of each boiler
as shown.
3. Install main system air eliminator and primary pump in
supply piping as shown in piping diagrams.
4. Place expansion tank on suction side of system pump as
shown.
5. Install system accessories as shown in drawings.
6. Piping recommendation drawings:
a. Figure 9, page 10 is a schematic piping drawing showing the locations of typical boiler piping and system
piping, including limits and other devices often
required by local codes.
b. Figure 9, page 10, Figure 10, page 16 and Figure 12,
page 18 are three-dimensional piping drawings of
typical multiple boiler installation.
c. Figure 14, page 20 shows recommended piping when
an isolating heat exchanger is needed.
7. If desired, other primary/secondary piping arrangements
can be used.
Boiler loop pipe sizing
1. Use no smaller than 3-inch schedule 40 steel pipe
(or 3-inch copper pipe) on all boiler loop piping.
2. Size boiler loop pumps to provide flow for a 30°F temperature rise. See Figure 8, page 9 for the corresponding flow
rate and head loss through the boiler.
3. Total head loss for the boiler loop pumps must include the
loss through all piping and fittings from the boiler to the
system main piping.
Recommended pipe sizing
Figure 6
Boiler head loss vs flow rate for SlimFit boilers
Figure 7
Recommended pipe sizing vs flow rate
Sch 40
Pipe
Diameter
Maximum
Flow rate
GPM
Sch 40
Pipe
Diameter
Maximum
Flow rate
GPM
2
45
6
800
3
140
8
1650
4
290
10
3000
5
500
12
4750
For pipe sizes other than 3 inch, provide reducers to adapt from external
piping to the boiler 3-inch supply and return flanged connections.
System design and sizing information in this
manual are intended as suggested guidelines only.
Apply recognized engineering design practices when
designing the system and selecting components.
Size the piping and the pumps to provide the required temperature rise. See Figure 6 for boiler head loss curves. See Figure 8,
page 9 for maximum and minimum flow rate through the
boiler as well as head loss vs flow rate.
Size system piping following Figure 7 or apply recognized
engineering practices to size the piping.
Each boiler is equipped with an internal low water
cutoff and limit control. Check local codes to see
if additional controls may be needed.
DO NOT design the piping and components for a boiler flow rate above or
below the range given in Figure 8. Insufficient
flow will cause nuisance outages due to limit
operation. Excessive flow can damage the boiler
heat exchanger from erosion.
Temperature limiting — The control module
uses temperature sensors to provide both high
limit protection, operating limit, and modulating
temperature control, and is UL353 Limit Controls
certified to meet ASME CSD-1 and Section IV
requirements.
For applications requiring system flow rates
higher or lower than those allowed in Figure 8,
page 9, use ONLY primary/secondary piping. Size
the boiler pump for the proper flow rate.
Low water protection — The boiler is equipped
with a low water cut-off and the manual reset is
performed through the control module.
–8–
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Multiple boiler water piping
(continued)
Backflow preventer
DO NOT design for flow rates above or
below the range listed in Figure 8. The
boiler and system components can be
damaged by excessive or insufficient flow.
Temperature rises shown below apply to
water only. For glycol/water applications,
the temperature rise will be different, but
the flow rate must be maintained within
the range listed below.
Figure 8
Flow rate and pressure drop data for
Slim-Fit boilers AT FULL INPUT
Install relief valve
1. Install relief valve (shipped loose with the boiler) in the 1¼-inch
tapping on top of the boiler supply outlet pipe.
2. Connect discharge piping to safe disposal location, following
guidelines in the WARNING below.
Installing relief valve
DO NOT install a relief valve with a pressure
higher than 100 PSIG. This is the maximum al-
SF1000
GPM
Temperature Rise (°F)
Boiler head loss (Feet w.c.)
43
44.5
4.1
50
38.3
5.1
** 63
30.4
7.4
70
27.4
8.7
80
24.0
10.9
90
21.3
13.3
96
20.0
14.8
** Suggested design flow rate (30°F temp. rise, water only)
SF1500
GPM
Temp.
Rise °F
Boiler head loss
Feet w.c.
64
44.9
4.8
75
38.3
6.3
** 96
29.9
9.7
105
27.4
11.3
120
24.0
14.3
135
21.3
17.7
144
20.0
19.9
SF2000
GPM
Temp.
Rise °F
Boiler head loss
Feet w.c.
85
44.8
6.6
100
38.1
7.8
** 127
30.0
11.5
140
27.2
13.5
160
23.8
16.9
180
21.2
20.6
191
20.0
22.8
** Suggested design flow rate (30°F temp. rise, water only)
lowable relief valve setting for the SlimFit boiler.
The boiler is shipped with a 30 PSIG relief valve.
See Replacement parts in the back of this manual
for alternate pressure setting relief valves.
To avoid water damage or scalding due to relief
valve operation, as per local or state codes:
Discharge line must be connected to relief valve
outlet and run to a safe place of disposal. Terminate
the discharge line in a manner that will prevent possibility of severe burns or property damage should
the valve discharge.
Discharge line must be as short as possible and be
the same size as the valve discharge connection
throughout its entire length.
Discharge line must pitch downward from the valve
and terminate at least 6” above the floor drain where
any discharge will be clearly visible.
The discharge line shall terminate plain, not threaded, with a material serviceable for temperatures of
375 °F or greater.
Do not pipe the discharge to any place where freezing
could occur.
** Suggested design flow rate (30°F temp. rise, water only)
Part number 550-100-190/0917
1. Use backflow check valve in cold water supply as required by
local codes.
No shutoff valve shall be installed between the relief
valve and boiler, or in the discharge line. Do not plug
or place any obstruction in the discharge line.
Test the operation of the valve after filling and pressurizing system by lifting the lever. Make sure the
valve discharges freely. If the valve fails to operate
correctly, replace it with a new relief valve.
Failure to comply with the above guidelines could
result in failure of the relief valve to operate, resulting
in the possibility of severe personal injury, death or
substantial property damage.
–9–
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Multiple boiler water piping (continued)
Figure 9
Piping schematic — typical piping for multiple SlimFit boilers, using multiple boiler manifolds
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Legend — Figure 9
1 Flow/check valve (each boiler).
2 Isolation valves (when used).
3 Strainer (recommended one each boiler on return line).
4 Multiple boiler manifold (supply) — layout and size per
Figure 7, page 8.
5 Multiple boiler manifold (return) — layout and size per
Figure 7, page 8.
6 Primary pump.
7 Expansion tank (diaphragm type).
11 Check valve or backflow preventer, as required by applicable
codes
12 Isolation valve.
13 Cold water supply.
16 Water flow switch (when used).
17 Boiler circulator (each boiler).
18 System supply.
19 System return.
8 System air eliminator.
20 Boiler relief valve and discharge piping, installed per SlimFit
Boiler Manual.
9 System automatic air vent.
25 External drain/blowdown valve, when used, ¾” NPT or larger.
10 Pressure reducing valve.
– 10 –
30 Strap system supply and return sensors to line as shown, at
least 6 pipe diameters (but no more than 3 feet) from boiler
connection tees.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Requirements by Boiler
Fast-Track Setup
s
Single boilers: PRIORITY 1, PRIORITY 2, PRIORITY 3.
SlimFit control Fast-Track Setup takes advantage of the SlimFit
control WIZARD to provide the shortest possible method to set
up the control.
DHW circuit in system — For high-demand DHW
circuits, the control setting for MIN BOILERS must
be set using the NETWORK 1 or NETWORK 2
priority menu after the WIZARD is completed to
ensure quick response to demand. See page 54 for
a description of the MIN BOILERS setting.
Perform the Fast-Track Setup steps on page 12 to ensure the
minimum adjustments needed for ADVANCED mode control
operation are completed.
The remainder of this manual provides detailed information
about control setup and operation available for fine tuning,
troubleshooting and custom setup applications.
Temperature settings — You must ensure
that the SlimFit control is set for the proper
water temperatures for the system. Excessive water temperature can cause significant
property damage in some applications.
Multi-temperature systems — If the
heating system includes circuits that require
lower temperature water (radiant slab circuits,
for example) as well as higher temperature
circuits (DHW, finned tube baseboard, etc.),
it is recommended to protect low-temperature
circuits with limit controls that are wired
to one of the external limit circuits on the
SlimFit boiler control. Failure to provide
regulation can result in substantial property
damage.
Timings
Timing settings regulate boiler sequencing and ensure minimum
and maximum operating times for heating calls on each system.
Timings can be adjusted during the Wizard setup or manually,
as explained elsewhere in this manual.
Also see page 50 for additional information on control timings
and rotation and sequencing methods.
NET MIN ON TIME (multiple boilers only)
s
This parameter is available during the Wizard or manually
in the NETWORK SETTINGS menu (Figure 28, page 49).
s
When a boiler is being called on by the master boiler to satisfy
a network demand, the boiler will fire for at least as long as
the MIN TIME ON NET before it switches to satisfy a Local
Priority if one is active.
s
This timing avoids short cycling due to changes in demand.
MIN ON TIME
Setup for single boilers
For single boilers not operated as part of an SlimFit network,
follow the single-boiler setup procedures in the SlimFit boiler
manual.
s
This parameter is available during the Wizard or manually
in the PRIORITY SETTINGS menu (Figure 33, page 55).
s
When the boiler is being called on to satisfy a higher priority,
the boiler will fire for at least as long as the MIN ON TIME
before it switches to satisfy that priority.
s
This timing avoids short cycling due to changes in demand.
Using an external multiple boiler controller —
Remote modulation using an external controller
only works with each boiler set up as a SINGLE
boiler in the SlimFit Control setup. Follow instructions in this manual to setup the control using
ADVANCED mode.
Multiple boiler networks
Multiple boiler networks are configured with a MASTER boiler
and one or more SHADOW boilers. (See above for applications
using external controller.)
s The MASTER boiler control regulates the firing of all boilers
when providing heat to the system zones.
s SHADOW boilers respond to heat demand from the master
control except when operating for local (direct-connected)
heat calls.
Priorities
The SlimFit control allows assigning multiple priorities. These
priorities will be given preference in the order below:
s Multiple boilers: LOCAL PRIORITY 1, NETWORK PRIORITY 1, NETWORK PRIORITY 2, LOCAL PRIORITY 2.
Part number 550-100-190/0917
NET MAX ON TIME (multiple boilers only)
s
This parameter is available during the Wizard or manually
in the NETWORK SETTINGS menu (Figure 28, page 49).
s
When a boiler is being called on by the master boiler to satisfy
a network demand, the boiler will fire for no longer than
the MAX TIME ON NET before it switches to satisfy a Local
Priority if one is active.
s
This timing avoids a long-duration call from preventing other
demands from being met for too long a duration.
MAX ON TIME
s
This parameter is available during the Wizard or manually
in the PRIORITY SETTINGS menu (Figure 33, page 55).
s
When a boiler is being called on by to satisfy a lower priority,
the boiler will fire for no longer than the MAX ON TIME
before it switches to satisfy that priority.
s
This timing avoids a long-duration call from preventing other
demands from being met for too long a duration.
– 11 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Steps
The WIZARD must be used when using the Fast-Track Setup procedure. This is necessary to ensure that all
required settings are made. In addition, all instructions in the SlimFit boiler manual must be followed completely.
Failure to comply could result in severe personal injury, death or substantial property damage.
s Install boiler(s) per SlimFit boiler manual and all applicable s As shown in the suggested piping examples, DHW tanks
can be either piped directly off of individual boilers or as a
Step 1 codes, including vent/air piping and water piping.
separate zone in the heating system.
s See suggested piping in this manual and boiler manual.
Mechanical
Each boiler must be connected with primary/secondary
s See page 6 for additional information on multiple boiler
piping and supplied with a boiler circulator.
installation options.
For details, see FIELD WIRING information beginning on
page 25.
BOILER POWER SUPPLY
s Connect minimum 120 VAC power to boiler as directed on
the boiler wiring diagram (on boiler and on page 30).
Step 2
Electrical
Step 3
POWER ON
Step 4
WIZARD
INPUTS & OUTPUTS
s Each boiler provides three input/output pairs. Input circuits
are 24 VAC. DO NOT apply voltage. Use dry contacts only.
Outputs are 120 VAC, 2.2-amps max (use relays if loads
exceed 2.2 amps or if outputs must be 24 VAC or must be
isolated contacts).
s The input/outputs can be used with zone thermostats and
zone circulators or zone valves (requires isolation relays
unless valves are 120 VAC), providing up to three zones per
boiler on a multiple system.
s Each boiler also provides an unpowered output for its boiler
circulator. Use a external relay if circulator requires more
than 10.0 amps at 120 VAC.
s If a system pump is to be operated by the SlimFit controls,
connect the pump to any of the available outputs. The
system pump can be activated by a remote contact or can
be automatically activated on heat demand. Set up for pump
operation is done in the ACTIVATE OUTPUT screen of the
WIZARD.
Start-up
– 12 –
MULTIPLE BOILER COMM CABLES
s For multiple boilers, connect boiler-to-boiler
communication cables as directed on page 37.
ADDITIONAL INFORMATION
s For flow switch or combustion air damper interlock wiring,
see page 34.
s For external limit connections, see page 33.
s For 0–10VDC inputs, see page 36.
ZONING METHODS
s See wiring and control setup information for typical zoning
applications beginning on page 38.
s See example systems beginning on page 16.
Follow all instructions in the SlimFit boiler s Turn the boiler ON/OFF switch to ON.
manual, including all pre-start-up inspec- s Follow the prompts on the screen to reach the BOILER
tions and final checks.
SETTINGS initial start-up screen.
s Turn OFF the manual gas cock at the boiler to prevent gas
s See Figure 22, page 42 for navigation information. Note that
flow during setup.
the screen sequence changes after initial setup, as shown.
s Select the START WIZARD option from the
initial screen BOILER SETTINGS menu (see
Figure 22, page 42).
s Use on-screen help as needed. For additional information,
see details in this manual.
s DO NOT select SKIP WIZARD unless the control is
to be configured manually.
s Some additional control settings may need to be changed,
Step 5 depending on the application.
s See explanation of SlimFit control operation and settings,
Finish setup
beginning on page 40.
Step 6
SENSORS
s Connect an outdoor sensor, system supply sensor and
system return sensor to at least one of the boilers in a
multiple boiler system..
s Preferably, connect outdoor, system supply and system
return sensors to more than one boiler to provide
redundancy. If one of the sensors fails, the master boiler
SlimFit control automatically looks for an available sensor.
SINGLE BOILERS — Set up the control following instructions in the SlimFit
boiler manual. If ADVANCED settings are
required, change to ADVANCED mode
from the CONTRACTOR menu. See
ADVANCED mode setup information
elsewhere in this manual.
s For high-demand loads requiring fast
response, such as network DHW, access the
NETWORK PRIORITY screen for the assigned priority (see
Figure 32, page 53). Change the MIN BOILERS to the
number of boilers needed for peak load.
s Apply the SlimFit boiler manual instructions to verify the
installation and to start up the boiler, using combustion test
instruments as directed.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — The WIZARD
s
The WIZARD is available only on initial setup of the boiler.
It cannot be accessed later. If the WIZARD is accidentally
by-passed, follow navigation sequences shown on page 47
and page 48. Select RESET FACTORY DEFAULTS on the
Boiler Settings menu. Follow screen directions. Boiler setup
must then be started over from the beginning.
BO I L E R
H I GH
WW S D
S E T T I NGS
A L T I T UD E :
T EMP :
NO
# # # º F
ST AR T W I Z ARD
SK I P W I Z ARD
FOR D E T A I L S ON AN
SE L E C T E D L I N E , PR E
B U T T ON .
TH E
H
S E L E C T
E
Y
S S
E L P
D I T
S L I MF I T W I Z ARD
# # O F # #
WH A T
I S T H E US E O F
I NPU T / OU T PU T - # ?
N
1
2
C
U
C
O
2
.
U
S
O
T
0
2
R
E
N
H E A
AUX
NO T
E :
V OU
AMP
R E N T
AN
T A C T
B A C K
T / D HW
/ P UMP
US E D
D EMAND
OU T PU T
T PU T S H
L I M I T .
I S R E Q
E X T E RNA
.
A V E A
I F MO R E
U I R E D ,
L
S E L E C T
N E X T
SL IMF I T WI ZARD
# # OF ##
WH A T P R I O R I T Y I S
I NPUT / OUTPUT - # ?
PR I OR I T Y
1 - LOCAL
PR I OR I T Y
2 - N E TWO R K
1
PR I OR I T Y
3 - N E TWO R K
2
PR I OR I T Y
4 - L OC A L
B A C K
WH A
P I P
F AN
F I NN
CA S T
CA S T
RAD I
RAD I
RAD I
RAD I
D HW
CUS T
T S Y
E D T
CO I L
E D T
I RO
I RO
AN T AN T AN T AN T -
2
H E L P
N E X T
S E L E C T
SL IMF I T
# # OF
1
WI ZARD
##
S T EM T Y P E
I S
O OU T PU T - # ?
U
N
N
S
T
B
A
B E
B
R
L A
H I
E L
BO
B A
A S E
AD I
B O
N S
OW
V E
S
B
A
N
L
F
F
E BO
OAR
T OR
GR
A B
L OO
L OO
ARD
D
ADE
R
R
OM - # # # # # # # #
B A C K
S E L E C T
Part number 550-100-190/0917
H E L P
N E X T
s
The WIZARD leads
through a step-by-step
setup procedure designed
for the application chosen.
s
Context-sensitive help
is available to explain
the purpose of key setup
items.
s This screen appears on initial start-up.
s Perform the WIZARD steps for every boiler.
s HIGH ALTITUDE parameters are critical. They
must be entered correctly for each boiler before
proceeding.
s Enter the WWSD temperature — This sets the
outside temperature below which space heating systems will be disabled. WWSD must also
be selected during system setup to enable it.
s Select START WIZARD.
s DO NOT select SKIP WIZARD. Selecting SKIP
WIZARD will take the screen to the USER
MENU. All setup would then have to be done
manually.
s NOTICE — Once SKIP WIZARD has been
selected, the WIZARD will no longer be
available unless the control is set to FACTORY
DEFAULT and control start-up is begun again.
s Each boiler provides three input/output pairs.
Each pair can be setup to function as a call for
heat with output or to perform an auxiliary
function, such as operating a system pump.
s After the WIZARD screens are completed for
INPUT 1, the WIZARD starts over with INPUT/
OUTPUT 2, then to INPUT/OUTPUT 3 after 2
is completed.
s Select HEAT/DHW DEMAND if the input/output is connected to a heating or DHW zone or
system. The input could be a zone thermostat
or end switch. The output could be 120 VAC to
a circulator (2.2 amps or less) or isolation relay.
s Select AUX PUMP/ OUTPUT if the input is to
be used for a system pump, combustion air
damper interlock, etc.
s To operate a system pump, setup the input
as AUX PUMP/OUTPUT. Connect the corresponding output to the system pump or
pump relay (if pump load exceeds 2.2 amps).
When the ACTIVATE OUTPUT # screen appears, select ANY INPUT BY ITS PRIORITY
SETTINGS as the operating mode.
s Select NOT USED if the input/output is not
needed.
s For multiple boiler applications, the SlimFit
control provides up to four priorities, as
listed on this screen. Preference is given to
these priorities in the order shown (Priority 1
through 4).
s Select which priority will be operated by this
input/output.
s All boilers can operate on demand from Network priorities.
s NETWORK PRIORITIES
– Any input on any boiler can be assigned to a
network priority (NETWORK PRIORITY 1
or NETWORK PRIORITY 2).
– The WIZARD will only allow setting up a
Network Priority on the Master boiler. It
will skip setting up a Network Priority on
all shadow boilers.
s Use this screen to select the system type for
this priority.
s The control will automatically set operating
parameters to suit the system type chosen.
s To see factory default settings for each system,
see Figure 25, page 46.
s Operating parameters can be customized in
the next screen, if desired.
s Select CUSTOM to manually configure the
operating settings for the system.
– All boilers on the network will fire to meet network demands
s LOCAL PRIORITIES
– Any boiler can use its input/outputs to
operate up to two local priorities (LOCAL
PRIORITY 1 and LOCAL PRIORITY 2).
This applies only for heating loops directly
piped to the boiler.
– Local demands are only satisfied by the
boiler to which the input is wired. Local
heating loops must be directly piped to
the boiler.
s NETWORK PRIORITY 1 or 2 — This screen
will not show on a shadow boiler if the input/
output is assigned to a network priority. The
screen will only appear on the Master boiler,
where the priority must be configured.
– 13 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — The WIZARD (continued)
If TARGET ADJUST = ODT
SL IMF I T WI
# # OF ##
SY S T EM T Y P E : # #
T A R G E T MO D S E N
BO I L
TARGE T AD JUST :
:
SUPP L Y MA X
SU
OD
OD
BO
RU
RU
MA
P P
R
R
OS
N
N
X
L
E
E
T
B
A
O
Y M I N
S E T MA X
S E T M I N
T I ME :
O I L E R P
U X / P UMP
N T I ME :
B A C K
S E L E C T
ZARD
######
SOR :
ER OUT
ODT
# # # ° F
:
:
:
#
#
#
#
UMP ?
OU T
#
If TARGET ADJUST = 0–10V
SL IMF I T WI Z
# # OF ##
SY S T EM T Y P E : # # #
T A R G E T MO D S E N S
BO I LE
TARGE T AD JUST :
:
SUPP L Y MA X
SU
VO
VO
BO
RU
RU
MA
P
L
L
O
N
N
X
P
T
T
S
L
S
S
T
B
A
O
Y
F
F
T
O I
UX
N
B A C K
M I N
OR MA
OR M I
I ME :
L E R P
/ P UMP
T I ME :
:
X :
N :
#
#
#
#
° F
° F
° F
M I
Y E
? Y E
# M I
H E L P
N E X T
N
S
S
N
ARD
#####
OR :
R OUT
0 - 1 0V
# # # ° F
#
#
#
#
UMP ?
OU T
#
S E L E C T
#
#
#
#
#
#
#
#
#
#
#
#
° F
° V
° V
M I
Y E
? Y E
# M I
H E L P
N E X T
N
S
S
N
If TARGET ADJUST = NONE
SL IMF I T WI ZARD
# # OF ##
SY S T EM
T ARG E T
TARG E T
SUP P L Y
T Y P E :
MO D S
BO
AD J US
MA X
#
E
I
T
:
# # # #
NSOR
L E R
: NO
# #
#
:
O
N
#
# #
U T
E
° F
RUN
RUN
MA X
B O I L E R P UMP ?
Y ES
A U X / P UMP O U T ? Y E S
ON T I ME :
# # M I N
H E L P
B A C K S E L E C T
N E X T
-
A
A
E
O
A
A
- A
S L I MF
# #
C T I V A T E
LWA Y S O
X T ERNA L
U T DOOR
NY
I NPU
NY
I NPU
PR I OR I T
NY BURN
B A C K
– 14 –
I T W I Z ARD
O F # #
OU T PU T - # :
N
SW I T C H
B E L O W WW S D
T
T B Y
I T S
Y S E T T I NGS
E R D EMAND
S E L E C T
s SYSTEM TYPE – Read only (assigned in
previous step).
s TARGET MOD SENSOR – Read only for
network boilers, adjustable for single boilers – Shows which sensor reading is used for
modulation. Boiler sensor is default for local
priorities. System sensor is default for network
priorities.
s TARGET ADJUST – Select how target temperature is calculated —
NONE (no reset, fixed target temperature =
SUPPLY MAX)
ODT (outdoor reset operation; default setting).
Target temperature is calculated from the
outdoor reset curve. SUPPLY MAX is target
temperature when outside temperature equals
OD RESET MAX. SUPPLY MIN is target
temperature when outside temperature equals
OD RESET MIN. At outdoor temperatures in
between, target temperature is scaled proportionally. See Figure 1, page 5 for details.
0–10V (target temperature based on input
from remote source). SUPPLY MAX is target
temperature at VOLTS FOR MAX value. SUPPLY MIN is target temperature at VOLTS FOR
MIN value. For voltage values between max
and min, target temperature is scaled proportionally. See Figure 2, page 5 for details.
s SUPPLY MAX – Set SUPPLY MAX to the
required supply water temperature for the
system at design maximum heat loss (typically 180°F for finned tube baseboard on new
installations.)
s SUPPLY MIN – SUPPLY MIN should equal the
desired minimum supply water temperature
for the system. This line will not show if Target
Adjust is selected as NONE.
s OD RESET MAX – means the outdoor temperature at which the target temperature reaches
its minimum (SUPPLY MIN). (Does not appear if 0–10V is selected for Target Adjust.)
s OD RESET MIN – means the outdoor temperature at which the target temperature reaches its
maximum value (SUPPLY MAX). (Does not
appear if 0–10V is selected for Target Adjust.)
s VOLTS FOR MAX – Appears if 0–10V is
selected for Target Adjust. Set the voltage at
which SUPPLY MAX temperature is required.
s VOLTS FOR MIN – Appears if 0–10V is selected
for TARGET ADJUST. Set the voltage at which
SUPPLY MIN temperature is required. For
voltages between Min and Max, the target
temperature will be adjusted on a linear curve.
s BOOST TIME – Every time the call for heat
surpasses this duration of time the target temp
will boost up 10F. It will cap off at Supply Max.
s RUN BOILER PUMP – Selects whether the
Boiler Pump is turned on while running on
this call for heat. This setting is YES for network priorities and is not adjustable.
s RUN AUX PUMP/ OUT – Selects whether Inputs/Outputs in the system configured as AUX
PUMP/OUTPUT are turned on while running
on this call for heat.
s MAX ON TIME / MIN ON TIME – Maximum or
minimum time the network will run on this
priority if it is being asked to run on another
network priority. MAX shows for Network
Priority 1, MIN shows for Network Priority 2.
This line ONLY shows on the Master boiler
Wizard. It does not appear on Shadow boilers.
s Use this screen to set when a SYSTEM
PUMP/AUX output is activated. For detailed
explanation, see Figure 35, page 58 and Figure 36, page 58.
H E L P
N E X T
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — The WIZARD (continued)
▼
▼
SL IMF I T
# # OF
WI ZARD
##
L OC A L
- N E TWO R K
SW I T C H I N G T I ME S
NE T
NE T
LP 2
X
ON
T I ME :
# # #M
|
N
X
ON
ON
T I ME :
T I ME :
# # #M
# # #M
|
N
ON
T I ME :
# # #M
▼
MA
|
▼
M I
MA
|
▼
M I
▼
L P 1
NE X T S T E P
B A C K S E L E C T
SL IMF I T
# # OF
BO I L E R
SE QU E NC E
L E AD
BO I
I NCR
RO T A T
FORC E L E
NE X T
H E L P
E D I T
WI ZARD
##
S E QU E NC I NG
T Y P E :
SMAR T
H I GH :
# # #%
L OW :
# # #%
BA S E RA T E
BA S E RA T E
L E R RO
EME N T A
E F R E Q
AD RO T
T A T E :
L HOURS
: # # DA YS
A T E : Y ES
S T E P
B A C K
S E T
H E L P
N E X T
S E L E C T
SL IMF I T
# # OF
DA T E
&
T I ME
H H : MM
DA T E :
MM / D D / Y Y
AM
S E L E C T
SL I MF I T
# # OF
D
#
S
S
X
T
E
:
T
T
T
E
L : # #
# # # #
A L L E
DA T
DA T
RV A L
WI Z ARD
B A C K
#
#
D
E
E
reduced rate until all boilers are on if necessary. Boilers are then allowed to modulate together as high as necessary to meet demand.
s Rotation means how and how often the boiler
firing order is changed.
– LEAD BOILER ROTATE options are
based on how long a boiler has operated. Select either OFF, BY BOILER ID, TOTAL
HOURS or INCREMENTAL HOURS.
See detailed explanation of options on
page 50.
– Use the ROTATE FREQ setting to control
how often the rotation sequence is changed.
– FORCE LEAD ROTATE – If set to YES,
then when the frequency timer expires and
the new order is calculated, this forces the
new boiler order to take effect while a heat
demand is currently active.
N E X T
WI ZARD
##
MA I N T E NANC E
I N F O
NAME : # # # # # # # # # # # # # # # #
PHON E : # # # - # # # - # # # #
MO
CP
I N
L A
NE
I N
s Use this screen to set how boilers are sequenced
and how usage is rotated between boilers on
the network.
s For a complete explanation of sequencing and
rotation, see page 50 and page 51.
s Sequencing means the way in which boiler
firing rate is controlled as boilers are turned on
and off by the master boiler.
– Three SEQUENCE TYPES are available:
SERIES sequencing allows each boiler to
reach full input before bringing on the next
boiler in sequence. PARALLEL sequencing
uses a limiter, called BASERATE HIGH, to
limit the firing rate before adding additional
boilers. SMART sequencing (factory default
setting) uses a low firing rate setting, called
BASERATE LOW, to keep boilers at a low
firing rate, bringing on additional boilers at
s This screen appears ONLY on the master boiler,
not on shadow boilers.
s Set the time and date to ensure that control
logs accurately record time/date of occurrences.
s Time and date information is provided to the
shadow boilers by the master boiler.
WI ZARD
##
T I ME :
B A C K
s The timings set on this screen prevent the boiler
from operating too long on one demand if
another demand is present. They also prevent
short cycling on a demand.
s LP1 and LP2 are times for local priorities.
s MIN NET ON TIME and MAX NET ON TIME
are the maximum and minimum times this
boiler will dedicate to a call from a network
demand.
# # # #
# # # #
:
:
:
S E T :
s Use this screen to enter relevant data about the
installer and boiler.
s See Figure 37, page 59 for full explanation of
the inputs on this menu.
# # # - # #
#
D
D
D
1
D / MM
D / MM
D / MM
2MO N
/
/
/
T
Y
Y
Y
H
Y
Y
Y
S
C OMP L E T E
S E L E C T
Part number 550-100-190/0917
H E L P
N E X T
– 15 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application A
Figure 10 Piping layout — typical piping for multiple SlimFit boilers, with DHW storage heater (or heaters) direct-piped to
one of the boilers
NOTICE:
This method does
not provided
DHW redundancy.
DHW can only
be supplied
when Boiler 2 is
operational.
Suggested DHW
boiler-side pipe
sizing (for max 0.04
feet head loss per foot of
total equivalent length,
TEL)
Flow rate
Size
Flow rate
Size
1 – 3.9 gpm
¾
24 – 45 gpm
2
3.9 – 7.1 gpm
1
45 – 75 gpm
2½
7.1 – 16 gpm
1¼
75 - 140 gpm
3
16 – 24 gpm
1½
140 – 290 gpm
4
DHW tanks piped using this arrangement need to be sized for
the required load, with a DHW pump selected to provide a flow
rate through the boiler and tank that is within the allowable flow
rate range listed in Figure 8, page 9 of this manual.
s Use 3” or larger piping for all
connections between boilers
and manifolds.
%SBJO
WBMWF
4'B
See Figure 11, page 17 for setting
up an alternate configuration if DHW
is located in the system as a zone
instead of being directly connected.
s Follow all sizing guidelines on
page 8. Pumps must provide
flow rates required.
s Use recognized engineering
design practices throughout.
Legend — Figure 10
1 Check valve (each boiler).
2 Isolation valves.
3 Strainer (recommended on return line to each
boiler).
4 Multiple boiler manifold (supply) — layout and
size per Figure 7, page 8.
5 Multiple boiler manifold (return) — layout and
size per Figure 7, page 8.
6 Primary pump.
7 Expansion tank (diaphragm type shown).
8 System air eliminator.
9 System automatic air vent.
– 16 –
13 Cold water supply (requires items 10, 11 and 12
as shown in Figure 9, page 10).
17 Boiler circulator (each boiler).
18 System supply.
19 System return.
20 Boiler relief valve and discharge piping (not
shown) — install per page 9 and all applicable
codes.
21 I n d i re c t - f i re d s t o r a g e w a t e r h e a t e r s
(Weil-McLain AQUA PLUS shown). See water
heater manual for DHW piping.
25 External drain/blowdown valve, when used,
¾” NPT or larger.
27 Flow/check valve in DHW piping.
30 Strap system supply and return sensors to the
system pipe as shown. Place sensor at least 6 pipe
diameters, but no more than 10 pipe diameters,
from boiler supply connection to the system pipe.
36 Secondary connection to boiler manifolds —
space no greater than 8 pipe diameters apart.
37 DHW pump.
Set the control so the boiler pumps, item 17, operate
on any call for heat, whether heating system or DHW.
Offset the DHW boiler-side supply and return manifolds as shown so the total run of pipe and fittings
to each of the water heaters is approximately equal.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application A (cont.)
Boiler Model, Altitude are critical settings. Failure to set correctly could result in severe personal injury, death or
substantial property damage.
Figure 11 Typical Application A — multiple boiler system — setup requirements (parameters not listed below can
be left at factory default settings unless special needs indicate different settings)
SETUP FOR Figure 10, page 16 AS SHOWN (DHW directly connected)
Boiler Wiring and Control Settings (See Figure 10, page 16 for items referenced)
Boiler
ID
TT
input
Wired
from:
Input
Assignment
Aux
Option
Output
Wired to:
***
1
Zone 1 Tstat
Priority 2 - Network 1
N/A
1
Zone 1 Circ/Valve
2
Zone 2 Tstat
Priority 2 - Network 1
N/A
2
Zone 2 Circ/Valve
3
No Wire
Aux Pump/Output *
Any TT Input By It's Priority Settings
3
System Circ
Relay (Item 6) *
1
DHW Tstat
Priority 1 - Local 1
N/A
1
DHW Circ. (Item 24)
2
Zone 3 Tstat
Priority 2 - Network 1
N/A
2
Zone 3 Circ/Valve
3
Zone 4 Tstat
Priority 2 - Network 1
N/A
3
Zone 4 Circ/Valve
1
Master
2
Shadow
* System circulator will not be used if system is circulator zoned. Aux Pump/Output would not be required.
Priority Settings
Priority #
Priority 1 – Local 1
(Boiler 2 only)
Setting
Value
System Type
DHW
Run Blr Pump
NO
Run Aux Output
NO
Priority #
Priority 2 – Network 1
(Boiler 1 only)
Setting
Value
System Type
Select heating
system type
Run Blr Pump
YES
Run Aux Output
YES
SETUP IF DHW IS LOCATED IN SYSTEM AS A ZONE
Boiler Wiring and Control Settings (See Figure 10, page 16. for items referenced)
Boiler
ID
TT
input
Wired
from:
Input
Assignment
Aux
Option
Output
Wired to:
***
1
Zone 1 Tstat
Priority 3 - Network 2
N/A
1
Zone 1 Circ/Valve
2
Zone 2 Tstat
Priority 3 - Network 2
N/A
2
Zone 2 Circ/Valve
System Circ (Item 6) *
1
Master
2
Shadow
3
No Wire
Aux Pump/Output *
Any TT Input By It's Priority Settings
3
1
DHW Tstat (Item 26)
Priority 2 - Network 1
N/A
1
DHW Circ/Valve
2
Zone 3 Tstat
Priority 3 - Network 2
N/A
2
Zone 3 Circ/Valve
3
Zone 4 Tstat
Priority 3 - Network 2
N/A
3
Zone 4 Circ/Valve
* System circulator will not be used if system is circulator zoned. Aux Pump/Output would not be required.
Priority Settings
Priority #
Priority 2 – Network 1
Setting
Value
System Type
DHW
Run Blr Pump
YES
Run Aux Output
YES
Priority #
Priority 3 – Network 2
Setting
Value
System Type
Select heating
system type
Run Blr Pump
YES
Run Aux Output
YES
*** Outputs are 120 VAC maximum 2.2 amps. Use relay for other voltages or higher amperages.
Part number 550-100-190/0917
– 17 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application B
Figure 12 Typical Application B — Piping layout — typical piping for multiple SlimFit boilers, with DHW storage
heaters (4-boiler system) (adjust boiler connections as required for other boiler models)
%SBJOWBMWF
%SBJO
WBMWF
DHW1
DHW2
Blr 1
Blr 2
Blr 3
4'
Suggested DHW
boiler-side pipe
sizing (for max 0.04
feet head loss per foot of
total equivalent length,
TEL)
Flow rate
Size
Flow rate
Size
1 – 3.9 gpm
¾
24 – 45 gpm
2
3.9 – 7.1 gpm
1
45 – 75 gpm
2½
7.1 – 16 gpm
1¼
75 - 140 gpm
3
16 – 24 gpm
1½
140 – 290 gpm
4
Blr 4
Legend — Figure 12
1 Check valve (each boiler).
2 Isolation valves.
3 Strainer (recommended on return line to
each boiler).
4 Multiple boiler manifold (supply) — layout
and size per Figure 7, page 8.
5 Multiple boiler manifold (return) — layout
and size per Figure 7, page 8.
6 Primary pump.
7 Expansion tank (diaphragm type shown).
8 System air eliminator.
9 System automatic air vent.
13 Cold water supply (requires items 10, 11 and
12 as shown in Figure 9, page 10).
17 Boiler circulator (each boiler).
18 System supply.
19 System return.
20 Boiler relief valve and discharge piping (not
shown) — install per page 9 and all applicable
codes.
21 Indirect-fired storage water heaters (WeilMcLain AQUA shown). See water heater
manual for DHW piping.
25 External drain/blowdown valve, when used,
¾” NPT or larger.
27 Flow/check valve in DHW piping.
– 18 –
30 Strap system supply and return sensors to the
system pipe as shown. Place sensor at least 6
pipe diameters, but no more than 10 pipe
diameters, from boiler supply connection to
the system pipe.
36 Secondary connection to boiler manifolds —
space no greater than 8 pipe diameters apart.
37 DHW pump.
Set the control so the boiler pumps, item 17,
operate on any call for heat, whether heating
system or DHW.
Offset the DHW boiler-side supply and return
manifolds as shown so the total run of pipe and
fittings to each of the water heaters is approximately equal.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application B (cont.)
Boiler Model, Altitude are critical settings. Failure to set correctly could result in severe personal injury, death or
substantial property damage.
Figure 13 Typical Application B — multiple boiler system — setup requirements (parameters not listed below can
be left at factory default settings unless special needs indicate different settings)
Boiler Wiring and Control Settings (See Figure 12, page 18 for items referenced)
Boiler
ID
1
Master
2
Shadow
3
Shadow
4
Shadow
TT
input
Wired
from:
Input
Assignment
Aux
Option
Output
Wired to:
***
1
No Wire
Aux Pump/Output **
Any TT Input By It's Priority Settings
1
System Circ (Item 6) **
2
Zone 1 Tstat
Priority 3 - Network 2
N/A
2
Zone 1 Circ/Valve
3
Zone 2 Tstat
Priority 3 - Network 2
N/A
3
Zone 2 Circ/Valve
1
Zone 3 Tstat
Priority 3 - Network 2
N/A
1
Zone 3 Circ/Valve
2
Zone 4 Tstat
Priority 3 - Network 2
N/A
2
Zone 4 Circ/Valve
3
Zone 5 Tstat
Priority 3 - Network 2
N/A
3
Zone 5 Circ/Valve
1
Zone 6 Tstat
Priority 3 - Network 2
N/A
1
Zone 6 Circ/Valve
2
Zone 7 Tstat
Priority 3 - Network 2
N/A
2
Zone 7 Circ/Valve
3
Zone 8 Tstat
Priority 3 - Network 2
N/A
3
Zone 8 Circ/Valve
1
DHW1 Tstat
Priority 2 - Network 1
N/A
1
DHW1 Circ
2
DHW2 Tstat
Priority 2 - Network 1
N/A
2
DHW2 Circ
3
DHW3 Tstat
Priority 2 - Network 1
N/A
3
DHW3 Circ
** System circulator will not be used if system is circulator zoned. Aux Pump/Output would not be required.
*** Outputs are 120 VAC maximum 2.2 amps. Use relay for other voltages or higher amperages.
Priority Settings
Priority #
Priority 2 – Network 1
Setting
Value
System Type
DHW
Run Blr Pump
YES
Run Aux Output
NO
Min Blrs *
Select as needed for quick
response
Priority #
Priority 3 – Network 2
Setting
Value
System Type
Select heating
system type
Run Blr Pump
YES
Run Aux Output
YES
* Min Blrs setting is accessible in the Priority menus (see Figure 28, page 49). It is not included in the Wizard setup options.
Alternate piping: DHW circuit piped elsewhere in system — If the DHW circuit is piped elsewhere in the
system, the above settings will work only if the System Pump is activated during DHW calls for heat. To set the control
for this, set PRIORITY 2 — NETWORK 1 with RUN AUX PUMP/ OUTPUT set to YES instead of NO.
Part number 550-100-190/0917
– 19 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application C
Figure 14
Typical Application C — Piping layout — typical piping for multiple SlimFit boilers, using isolation
exchanger (adjust boiler connections as required for other boiler models)
Use an isolation heat
exchanger for:
r -BSHFWPMVNFTZTUFNTXJUI
IJHINJOFSBMDPOUFOUJO
XBUFS
r 4ZTUFNTFYQPTFEUP
VOUSFBUFERVBOUJUJFTPG
NBLFVQXBUFS
r 0METZTUFNTTFWFSFMZDPO
UBNJOBUFEXJUITDBMFBOE
SVTUCVJMEVQJOTJEFQJQJOH
BOEIFBUEJTUSJCVUJPOVOJUT
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VˆÀVՈÌ
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D
r 1SPDFTTBQQMJDBUJPOT
r $PNNFSDJBMTFSWJDFXBUFS
BQQMJDBUJPOT
r )JHIXBUFSQSFTTVSFBQQMJ
DBUJPOT SFRVJSJOHQSFTTVSF
SFMJFGTFĨJOHJOIFBUJOHTZT
UFNNPSFUIBOଙ14*(
UBMMCVJMEJOHT E
s Use 3” or larger piping for all connections between
boilers and manifolds.
s Follow all sizing guidelines on page 8. Pumps must
provide flow rates required.
s Use recognized engineering design practices
throughout.
4'
Legend — Figure 14
1 Check valve (each boiler).
2 Isolation valves.
3 Strainer (recommended on return line to each
boiler).
4 Multiple boiler manifold (supply) — layout and
size per Figure 7, page 8.
5 Multiple boiler manifold (return) — layout and
size per Figure 7, page 8.
6a Heating system pump (exchanger tube-side).
6b Heat exchanger shell-side pump.
7 Expansion tanks (diaphragm type).
8 System air eliminator.
9 System automatic air vent.
13 Cold water supply (requires items 10, 11 and 12
as shown in Figure 9, page 10).
– 20 –
17
18
19
20
Boiler circulator (each boiler).
System supply.
System return.
Boiler relief valve and discharge piping (not
shown) — install per page 9 and all applicable
codes.
25 External drain/blowdown valve, when used, ¾”
NPT or larger.
30 Strap system supply and return sensors to the
system pipe as shown. Place sensor at least 6 pipe
diameters, but no more than 10 pipe diameters,
from boiler supply connection to the system pipe.
36 Secondary connection to boiler manifolds —
space no greater than 8 pipe diameters apart.
1.
2.
3.
4.
Contact heat exchanger manufacturer for heat
exchanger shell-side and tube-side piping and
pump requirements. Tube-side flow and temperatures must meet heating system requirements.
Contact heat exchanger manufacturer for sizing
heat exchanger.
Heat exchanger shell-side circuit requires its own
expansion tank as shown.
Heating system circuit requires its own expansion
tank, as shown, plus its own relief valve set to
protect heating system and heat exchanger piping
and components.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application C (cont.)
Boiler Model, Altitude are critical settings. Failure to set correctly could result in severe personal injury, death or
substantial property damage.
Figure 15 Typical Application C — multiple boiler system — setup requirements (parameters not listed below can
be left at factory default settings unless special needs indicate different settings)
Boiler Wiring and Control Settings (See Figure 14, page 20 for items referenced)
Boiler
ID
1
Master
2
Shadow
3
Shadow
4
Shadow
TT
input
Wired
from:
Input
Assignment
Aux
Option
Output
Wired to:
***
1
No Wire
Aux Pump/Output **
Any TT Input By It's Priority Settings **
1
System Circ (Item 6a)
2
No Wire
Aux Pump/Output
Any TT Input By It's Priority Settings
2
Shell-side Circ (Item 6b)
3
Zone 1 Tstat
Priority 2 - Network 1
N/A
3
Zone 1 Circ/Valve
1
Zone 2 Tstat
Priority 2 - Network 1
N/A
1
Zone 2 Circ/Valve
2
Zone 3 Tstat
Priority 2 - Network 1
N/A
2
Zone 3 Circ/Valve
3
Zone 4 Tstat
Priority 2 - Network 1
N/A
3
Zone 4 Circ/Valve
1
Zone 5 Tstat
Priority 2 - Network 1
N/A
1
Zone 5 Circ/Valve
2
Zone 6 Tstat
Priority 2 - Network 1
N/A
2
Zone 6 Circ/Valve
3
Zone 7 Tstat
Priority 2 - Network 1
N/A
3
Zone 7 Circ/Valve
1
Zone 8 Tstat
Priority 2 - Network 1
N/A
1
Zone 8 Circ/Valve
2
Zone 9 Tstat
Priority 2 - Network 1
N/A
2
Zone 9 Circ/Valve
3
Zone 10 Tstat
Priority 2 - Network 1
N/A
3
Zone 10 Circ/Valve
** System circulator will not be used if system is circulator zoned. Aux Pump/Output would not be required.
*** Outputs are 120 VAC maximum 2.2 amps. Use relay for other voltages or higher amperages.
Priority Settings
Priority #
Setting
Value
System Type
Select CUSTOM and set
temperatures and other as
needed for heat exchanger
Run Blr Pump
YES
Run Aux Output
YES
Priority 2 – Network 1
Part number 550-100-190/0917
Priority #
Setting
Value
– 21 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application D
Figure 16
Typical Application D — Piping layout — typical piping for multiple SlimFit boilers, using isolation
exchanger (adjust boiler connections as required for other boiler models)
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D
E
4'"QQM%
Legend — Figure 16
1 Flow/check or spring check valve.
2 Isolation valves (when used).
3 Strainer (recommended on return line
to each boiler).
4 Multiple boiler manifold (supply)
5 Multiple boiler manifold (return)
6a Heating system circulator
(exchanger tube-side).
6b Heating system shell-side circulator
7 Expansion tanks (diaphragm type).
8 System air eliminator.
9 System automatic air vent.
12 Boiler drain valves.
13 Cold water supply connections (per
applicable codes).
14 Primary/secondary connections (tees
no more than eight (8) pipe diameters
apart.
– 22 –
17 Boiler circulator — Boiler circulators are piped to
pump into the SlimFit boiler for best results with the
higher pressure drop of the boiler. Boiler circulators
on the High Mass boilers are piped to pump away
from the boiler.
18 Heating system supply.
19 Heating system return.
20 Boiler relief valve and discharge piping, installed
per SlimFit boiler manual. All others boiler’s relief
valves and discharge piping installed per manufacturer’s instructions.
25 External drain/blowdown valve, when used, ¾”
NPT or larger.
27 Flow/check or spring check valves (to prevent induced
or gravity flow in heating system or DHW piping).
28 Check valve.
30 Strap system supply and return sensors to lines as
shown, at least 6 pipe diameters (but no more than
3 feet) from boiler connection tees. For redundancy,
you can install multiple sensors, each connected to
a different boiler.
31 Unions.
36 Secondary connection to boiler manifolds — space no
greater than 8 pipe diameters apart.
1.
2.
3.
4.
Contact heat exchanger manufacturer for heat exchanger
shell-side and tube-side piping and pump requirements.
Tube-side flow and temperatures must meet heating
system requirements.
Contact heat exchanger manufacturer for sizing heat
exchanger.
Heat exchanger shell-side circuit requires its own expansion tank as shown.
Heating system circuit requires its own expansion tank,
as shown, plus its own relief valve set to protect heating
system and heat exchanger piping and components.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Fast-Track Setup — Typical Application D (cont.)
Boiler Model, Altitude are critical settings. Failure to set correctly could result in severe personal injury, death or
substantial property damage.
Figure 17 Typical Application D — multiple boiler system — setup requirements (parameters not listed below can
be left at factory default settings unless special needs indicate different settings)
Boiler Wiring and Control Settings (See Figure 16, page 22 for items referenced)
Boiler
ID
1
Master
2
Shadow
TT
input
Wired
from:
Input
Assignment
Aux
Option
Output
Wired to:
***
1
No Wire
Aux Pump/Output **
Any TT Input By It's Priority Settings **
1
System Circ (Item 5)
2
Zone 1 Tstat
Priority 3 - Network 2
N/A
2
Zone 1 Circ/Valve
3
Zone 2 Tstat
Priority 3 - Network 2
N/A
3
Zone 2 Circ/Valve
1
Zone 3 Tstat
Priority 3 - Network 2
N/A
1
Zone 3 Circ/Valve
2
Zone 4 Tstat
Priority 3 - Network 2
N/A
2
Zone 4 Circ/Valve
3
Zone 5 Tstat
Priority 3 - Network 2
N/A
3
Zone 5 Circ/Valve
** System circulator will not be used if system is circulator zoned. Aux Pump/Output would not be required.
*** Outputs are 120 VAC maximum 2.2 amps. (Except Boiler Pump Output). Use relay for other voltages or higher amperages.
Priority Settings
Priority #
Setting
Value
System Type
Select heating
system type
Run Boiler Pump
YES
Run Aux Output
YES
Additional Heat
Demand
ODT
ODT Setpoint
As required for
application
Activate
Contact Below
Setpoint
1st or 2nd
based on
system sizing
Priority 3 – Network 2
Priority #
Setting
Value
System Function Notes:
Combine Weil-McLain condensing boilers and large-mass boilers in one system controlled by the SlimFit control.
Use condensing boilers during LOW-LOAD periods (spring, fall) and high-mass boilers during HIGH-LOAD periods.
The SlimFit control will sequence the high mass boiler when needed.
Use accepted engineering methods to design this system for desired system efficiency and behavior. Ensure that
settings for ODT SETPOINT and ACTIVATE CONTACT BELOW SETPOINT are adjusted to the design conditions
of the system for proper operation.
Part number 550-100-190/0917
– 23 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Additional heat demand
Additional heat demand
1. This settings acts as a contact to activate other boilers or heating sources, such as a different boiler or a furnace.
a. OFF – Function disabled.
b. 1st – The additional heat demand contact will be activated
before the SlimFit boiler.
i. When the SlimFit boiler receives a call for heat, it
immediately activates the “Additional Heat Demand
contact”, terminals P16 #6 and #7. This contact is
used to start the next heat source.
ii. If “0-10v Output” is being used, “Temp Dependent”
must be set to YES. If the Priority configured for Additional Heat Demand is currently active 2 volts will
be immediately sent from P16 #1 and #2 to the next
heating source.
iii. After 1 minute, the 0-10v output will begin to modulate, based on the system temperature. When the
Response Time is reached, the SlimFit boiler begins
its startup sequence and continues to heat until the
demand is satisfied.
c. 2nd – The additional heat demand contact will be activated after the SlimFit boiler.
i. When the SlimFit boiler receives a call for heat, it begins its startup sequence and also starts the Response
Time.
ii. After the Response Time expires, the Additional Heat
Demand contact is closed and the 0-10v Output (if
used, w/Temp Dependent set to YES) sends 2 volts
from P16 #1 and #2 to the next heating source.
iii. The 0-10v Output will modulate based on the requested SlimFit boiler modulation rate. If a boiler
lockout occurs, the 0-10v Output will continue to
modulate based on this requested rate.
d. ODT - A user defined ODT SETPOINT is used as a
switching point to operate Additional Heat Demand
(AHD) as 1st or 2nd as defined by the user setting
ACTIVATE CONTACT BELOW SETPOINT.
i. If ACTIVATE CONTACT BELOW SETPOINT is set to
1st ,additional heat demand functionality will operate
as AHD 1st below the ODT SETPOINT temperature
and operate as AHD 2nd above the ODT SETPOINT
temperature.
ii. If ACTIVATE CONTACT BELOW SETPOINT is set
to 2nd the functionality would be reversed.
iii. If the ODT sensor fails; default AHD to activate
based on the user setting for ACTIVATE CONTACT
BELOW SETPOINT.
2. Temperature Dependent
a. When System Temperature Dependent is set to YES, the
SlimFit boiler must have system supply and return sensors connected and the target modulation sensor will be
set to the supply sensor.
b. If system supply and return sensors are not connected,
the System Temperature Dependent cannot be selected.
– 24 –
c. With this option selected to YES, the boiler and additional
heat demand/0-10v output will modulate based on the
system temperature. If the system temperature becomes
higher than setpoint temperature + system off differential, the boiler and additional heat demand/0-10v output
will turn off. The boiler and Additional Heat Demand
will become active again when the system temperature
becomes lower than setpoint temperature – System on
Differential.
3. 0-10v Output – The boiler will output a voltage signal equivalent to the modulation rate of the SlimFit.
a. Max/Min Rate Volts
i. The MAX RATE VOLTS and MIN RATE VOLTS are
used to scale the analog output such that the 20%
minimum modulation rate will output MIN RATE
VOLTS and the 100% modulation rate will output
MAX RATE VOLTS.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28
Wiring must be N.E.C. Class 1. If original wiring as supplied with boiler must be replaced,
use only type 105 °C wire or equivalent. Boiler
must be electrically grounded as required by
National Electrical Code ANSI/NFPA 70 –
latest edition, and/or the Canadian Electrical
Code Part I, CSA C22.1, Electrical Code.
ELECTRICAL SHOCK HAZARD — For
your safety, turn off electrical power supply at service entrance panel before making any electrical connections to avoid possible electric shock hazard. Failure to do so
can cause severe personal injury or death.
The installation must comply with: National
Electrical Code and any other national, state,
provincial or local codes or regulations. In
Canada, CSA C22.1 Canadian Electrical Code
Part 1, and any local codes.
Do not use 24V from transformer to power any
external devices that are not listed in this manual.
The boiler when installed, must be electrically
bonded to ground in accordance with the requirements of the authority having jurisdiction
or, in the absence of such requirements, with the
National Electrical Code, ANSI/NFPA 70 – latest
edition, and/or the Canadian Electrical Code
Part I, CSA C22.1, Electrical Code.
Figure 18 Wiring entrances
Wire entrances
Eight knockouts are provided in the top of the cabinet for line
and low voltage wiring. See Figure 18 for locations.
Installer MUST use a strain relief through jacket knockouts.
Failure to do so can cause severe personal injury, death or substantial property damage.
Wiring overview
See details on the following pages for the wiring connections
outlined below:
Required wiring connections
s
120VAC power to boiler; 120VAC power out to boiler circulator; system supply and return temperature sensors.
Connections as needed by systems
s Thermostat, end switch or other inputs for call for heat.
s System zone circulators, valves, relays, etc.
s System circulator, when required.
s Outdoor temperature sensor.
Optional wiring connections
s
Line voltage power input
1. Boiler line voltage power — Boiler load: SF1000 — 12.1 amps;
SF1500 — 20.7 amps; SF2000 — 23.2 amps.. Provide and
install a fused disconnect or service switch as required by
applicable codes. Fuse or breaker rating must be sized accordingly.
2. Boiler Circ activation circuit — Provide external power for
pump’s, 120 VAC/1-phase, size as required for the pump load.
Interrupt pump’s hot line with the connections on EP7 screw
terminal. Maximum current rating of relay is 10 Amps.
External limits; closure switch interlocks (combustion air
damper, flow switch, etc.); 0–10VDC for target or modulation control; remote alarm; additional heat demand contact;
and communication cables for boiler networking and/or
building management system interface (MODBUS).
Continued after page 30
Part number 550-100-190/0917
– 25 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
Schematic Diagram
Figure 19 Schematic wiring diagram — SlimFit boilers (continued on next page)
– 26 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
Schematic Diagram (continued)
Figure 21 (continued from previous page) Schematic wiring diagram — SlimFit boilers
Part number 550-100-190/0917
– 27 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
Ladder Diagram
Figure 20 Ladder wiring diagram — SlimFit boilers (continued on next page)
– 28 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
Ladder Diagram (continued)
Figure 22 (continued from previous page) Ladder wiring diagram — SlimFit boilers
Part number 550-100-190/0917
– 29 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
A. 120 VAC Power Supply – REQUIRED
Terminal Block P1
1. Boiler line voltage power — Boiler loads are listed below. Provide and install
a fused disconnect or service switch as required by applicable codes.
2. Connect properly sized 120 VAC power wiring to SlimFit boiler line voltage
terminal strip as shown at right.
3. If possible, provide a surge suppressor in the supply power line. This will reduce
the possibilities of control damage due to line surges.
4. Must wire ground to this terminal to provide boiler grounding.
SF1000 — 12.1 amps;
SF1500 — 20.7 amps;
SF2000 — 23.2 amps
See Figure 19, page 26 for details
B. 120 VAC Outputs 1, 2 & 3 – On each boiler – As needed for systems
Terminal Strip P2
1.
2.
3.
4.
Output 1: P2 Terminals 1 (H), 4 (N), 7 (G).
Output 2: P2 Terminals 2 (H), 5 (N), 8 (G).
Output 3: P2 Terminals 3 (H), 6 (N), 9 (G).
Maximum load: 2.2 amps (use relay if circulator load is higher). See WARNING below.
5. Each boiler has three outputs (Output 1, Output 2, and Output 3) that provide
120 VAC to the following listed below.
s A zone circulator.
s A system circulator.
s A DHW circulator (used to circulate through an indirect tank).
s An auxiliary item that must be energized during an input call, such as
an air damper.
6. When using inputs/outputs for heat/DHW demands, each input (Input 1,
Input 2, and Input 3) controls its respective 120 VAC output (Output 1,
Output 2, and Output 3). Outputs are energized only when BOTH conditions below are met:
a. The corresponding input indicates a call for heat/DHW (i.e., contact
closure).
b. The PRIORITY assigned to the Input/Output pair is ACTIVE (i.e., the
zone may be calling but the pump won’t activate unless the boiler is currently running on that system/priority).
7. When using the inputs/outputs for the AUX PUMP/OUTPUT function, the
output is controlled by selectable conditions set up in the control.
a. Use the AUX PUMP/OUTPUT function for devices such as system pumps,
combustion air dampers, and other auxiliary equipment to activate when
the boiler is on/running.
b. See page 57 and page 58 for more information on the setup and selection
of operating conditions.
For Priority DHW Application:
The DHW aquastat can be connected to any one of the three input/
output pairs. The selected input should be assigned to PRIORITY 1
during the WIZARD setup or manually in the ASSIGN INPUTS
menu.
CIRCULATOR POWER — The maximum allowable current for each circulator is 2.2 amps
at 120 VAC.
– 30 –
See Figure 19, page 26 for details
Output circuits are 120 VAC. If an
output is to operate a low voltage circuit or must be an isolated contact,
use an isolation relay. See example
above for 24 VAC zone valves.
For circulators with higher amp ratings, install a circulator
relay or starter. Connect only the 120 VAC coil to the SlimFit
circulator terminals.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
C. 120 VAC to Boiler Circulator – REQUIRED
Terminal Strip EP7 (BOILER CIRC) (Expansion module, top right)
1.
2.
3.
4.
Provides 120 VAC Dry Contact for boiler circulator.
Terminals are: 1 (H), 2 (H).
Maximum load: 10 amps (use relay if circulator load is higher).
Provide and install a fused disconnect or service switch (15-ampere rated
recommended) as required by applicable codes for circulator with maximum
load of 10 amps.
5. The boiler circulator is used in the boiler loop of the primary / secondary
piping. Primary / secondary piping is recommended to be used with the
SlimFit boiler to ensure proper flow through the heat exchanger.
Other designed piping arrangements will work as long as water flow
requirements are met from page 9, contact your local Weil-McLain
commercial representative for assistance.
See Figure 19, page 26 for details
D. 24 VAC Inputs 1, 2 and 3 (tstats, end switches, etc.) – As needed for systems
Terminal Strip P11 (input 1) & Terminal Strip P15 (inputs 2 & 3)
1.
2.
3.
4.
Input 1 – Terminal Strip P11 – 4 & 5 (SlimFit terminal bus).
Input 2 – Terminal Strip P15 – 1 & 2 (SlimFit terminal bus).
Input 3 – Terminal Strip P15 – 3 & 4 (SlimFit terminal bus).
These three inputs on each boiler can indicate a call for heat to the control
by means of a dry contact closure (thermostat, aquastat, or switch). (See
right and Figure 19, page 26).
5. The control provides inputs for up to three zones or three systems (priorities).
The control default setting is for three space heating zones tied to
PRIORITY 2, which is defaulted to FINNED TUBE BASEBOARD
system type.
6. For DHW applications, the aquastat can be connected to one of the three
input/output pairs. Take advantage of factory default settings by using PRIORITY 1 for the DHW system. The default control setting for PRIORITY 1
is a direct-piped DHW system type.
7. The default control setting uses each input (INPUT 1, INPUT 2, and INPUT 3) to control its respective 120VAC output (OUTPUT 1, OUTPUT 2, and
OUTPUT 3).
Use of 0–10VDC input for modulation disables Input 1 from creating calls for heat. See page 36 for instructions.
An input can be assigned to an AUX PUMP/OUTPUT function to
operate a system pump or interlock with a combustion air damper.
Inputs assigned for this function cannot be used for heat demand
operation. See page 57 and page 58 for more information on the
setup and selection of operating conditions.
See Figure 19, page 26 for details
Thermostats — DO NOT supply 24-volt power to the thermostat
Zone valves — If using 3-wire zone valves, use
circuits (Input1, Input2 and Input3 in Figure 19, page 26) or attempt to supply 24 volts for any other application.
For thermostats that require a continuous 24-volt power source,
connect the common wire (“C”) to P11 Pin 2 (see Figure 19,
page 26). Do NOT exceed total amp draw per thermostat.
relays to provide dry contacts to the Control thermostat connections. The zone valve end switches
of 3-wire valves carry 24 VAC from the valve.
Part number 550-100-190/0917
Thermostat anticipator setting — 0.1 amps.
– 31 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
(See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
E. System supply and return temperature sensors – REQUIRED
Terminal Block P14 #1 & #2
1. Two strap-on temperature sensors are shipped with each boiler. Attach one
to the system supply piping and the other to the system return piping. For
piping larger than 5 inch diameter or nonmetallic piping, using immersion
sensors will provide faster response. See SlimFit boiler manual replacement
parts section for available immersion sensors.
2. Locate the supply sensor at least six pipe diameters, but no further than 3
feet, downstream from the boiler connection to the main to ensure adequate
mixing.
3. Supply sensor – wire between P14 #1 and #2 (common).
Strap to supply & return piping
4. Return sensor – wire between P14 #3 and #2 (common).
5. Thermostat wire can be used to connect these sensors.
6. The Control compares the system return temperature with the system supply
temperature. Should the return temperature ever exceed the supply temperature, the Control knows there is likely a sensor failure and will report this
problem on the display.
All heating systems shown in this manual require the System Supply and Return sensors to be installed for proper control function.
System will not properly provide heat if sensors are not installed
according to these instructions.
See Figure 19, page 26 for details
F. Outdoor temperature sensor – OPTIONAL
Terminal Block P10 #1 & #2
1. The control provides programmable options if using an outdoor temperature sensor. This sensor is supplied with the boiler.
2. Mount the outdoor sensor on an exterior wall, shielded from direct sunlight
or flow of heat or cooling from other sources.
3. The wire outlet on the sensor must be oriented DOWN to prevent water
entry.
4. Connect the sensor leads to the terminal shown at right and in the wiring
diagrams (see Figure 19, page 26). Thermostat wire can be used to connect
the sensor.
– 32 –
See Figure 19, page 26 for details
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
G. External limits – OPTIONAL
To cause MANUAL reset: Terminal Block P13 #1 & #2
SlimFit control will require manual reset after circuit is interrupted
1. Remove factory-installed jumper and connect isolated contacts of external
limits across P13 pins 1 and 2 to cause the control to enter manual reset lockout if the limit circuit opens. The limit must close and the control must be
manually reset using the procedure given in this manual. See drawing at right
and wiring diagram (Figure 19, page 26).
The control will lockout when a limit in its manual reset circuit opens
(P13 pins 1 & 2). The control activates its alarm terminals and shuts
the boiler off. An operator (user or technician) must manually reset
the control to resume heating. Cycling power on and off will NOT
reset the control.
See Figure 19, page 26 for details
To cause AUTOMATIC reset: Terminal Block P13 #3 & #4
SlimFit control will reset automatically after circuit is interrupted
1. Remove factory-installed jumper and connect isolated contacts of external
limits across P13 pins 3 and 4 to cause the control to shut down the burner
on limit opening, then automatically restart 150 seconds after the limit closes.
2. See drawing at right and wiring diagram (Figure 19, page 26).
See Figure 19, page 26 for details
H. Alarm contacts – OPTIONAL
Terminal Block P16 #4 & #5
1. The control’s alarm dry contact (P16, terminals 4 and 5) closes when the
boiler enters manual lockout only.
2. Connect these terminals for remote alarm notification.
3. Contact electrical ratings: 24 VAC or less; 0.5 amp or less.
See Figure 19, page 26 for details
Part number 550-100-190/0917
– 33 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
I. Closure switch (flow switch and/or CAD) – OPTIONAL
Jumper on Terminal Strip P11
1. A flow switch or combustion air damper (CAD) interlock can be configured by removing jumper.
2. No control settings are required when using a flow switch.
3. Recommended configuration of the SlimFit control for a CAD interlock:
a. Assign INPUT 3 as a AUX PUMP/ OUTPUT function.
b. For the AUX PUMP/OUTPUT operating mode, select ANY BURNER
DEMAND. This ensures the damper will be activated any time the boiler
is called on to fire.
c. OUTPUT 3 will provide 120VAC to the damper motor. Use an isolation
relay if damper motor requires another voltage or more than 2.2 amp if
using 120 VAC.
* The devices used must provide electrically isolated contacts,
because the P7 jumper circuit carries 5 VDC.
4. When a call for heat occurs, the corresponding output(s) energize, and the
blower does not activate until the closure switch is made. The boiler is given
four (4) minutes to make the closure switch. If the switch opens prior to
ignition, the timer continues with the blower remaining active. After four
(4) minutes, if the closure switch is not made, or if the closure switch opens
during burner firing, the control locks out. The fault will clear when the
closure switch makes The corresponding output(s) will remain energized in
an attempt to close the switch.
– 34 –
See Figure 19, page 26 for details
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
J. 0 –10 VDC Remote TARGET input – OPTIONAL
Terminal Block P15 #5 & #6
1. See illustration at right and Figure 19, page 26 (wiring diagram) for details.
2. Remote target using 0–10VDC input requires a 0–10VDC input signal at
P15-4/5 as shown at right.
a. The input positive connection must be at P15 terminal 6 and the common
connection at terminal 5.
3. This illustration also shows how to connect TT or end switch contacts at
INPUT 1, INPUT 2 and INPUT 3.
a. If a Heat/DHW demand is required, connect the demand’s dry contact
to an unused input on the control and its pump/valve to the respective
output. Then assign and setup a priority to the input using the Wizard
or manually through the contractor menu.
b. A dry contact heat demand must be applied to one of the inputs in order
to initiate a call for heat.
4. The 0–10VDC signal is used to adjust the supply target temperature, using
the TARGET ADJUST setting. Set TARGET ADJUST during the WIZARD
or manually in the PRIORITY SETTINGS menu for the desired PRIORITY.
a. Many options are available for configuring the control. The following is
a suggested setup that uses factory default settings as much as possible.
b. Use PRIORITY 1 for the DHW heating system when used. This priority’s
default values are set for DHW, direct-piped to the boiler. Verify that settings are suitable for the application, change if needed.
See Figure 19, page 26 for details
c. Use PRIORITY 2 for the heating systems.
s
For single boilers, the factory default settings for PRIORITY 2
make this priority a good choice for space heating applications.
Set PRIORITY 2 values to the following:
s
Set TARGET ADJUST value to 0–10V.
s
Set VOLTS FOR MAX at the voltage that will call for the highest target
temperature. Set SUPPLY MAX at this temperature.
s
Set VOLTS FOR MIN at the voltage that will call for the lowest target
temperature. Set SUPPLY MIN at this temperature.
s
For voltages between VOLTS FOR MAX and VOLTS FOR MIN, the
target temperature will range proportionately between SUPPLY
MAX and SUPPLY MIN. See the SlimFit Advanced Manual for a full
discussion.
NOTE: The 0–10VDC signal replaces the ODT sensor as the target temperature
modifier (TARGET ADJUST setting). The control does not control
target.
Part number 550-100-190/0917
– 35 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
K. 0–10 VDC Remote MODULATION input – OPTIONAL
Terminal Block P15 #5 & #6 (SlimFit control module, left side)
Using an external multiple boiler controller — Remote modula-
tion using an external controller only works with each boiler set up
as a SINGLE boiler in the SlimFit Control setup.
1. See illustration at right and Figure 19, page 26 for details.
2. This illustration also shows how to connect TT or end switch contacts at
INPUT 2 and INPUT 3 for other uses.
3. This function can only be used with a single boiler, NOT for a boiler in a
network.
4. Note that using 0–10VDC input replaces INPUT 1 to generate a heat demand
as shown at right.
5. Remote modulation requires a 0–10VDC input signal at P15-4/5 as shown
at right.
a. The 0–10VDC input positive connection must be at terminal 6 and common connection at terminal 5.
6. Control setup:
a. Many options are available for configuring the control. The following is
a suggested setup that uses factory default settings as much as possible.
b. If DHW is required, use PRIORITY 1 to minimize setup steps.
s Connect the DHW aquastat to INPUT 2 or INPUT 3 and assign the
input used to PRIORITY 1.
s Verify that control settings are suitable for the application, changing
if necessary.
c. Use PRIORITY 2 for the system to be remote modulated.
s The factory default settings for this priority are best suited for space
heating.
s Assign INPUT 1 to the priority chosen. Accept all defaults for INPUT 1
— no changes should be necessary during the WIZARD.
s After the WIZARD has been completed, go to the ASSIGN INPUTS
menu for INPUT 1. Change SOURCE to 0–10V (default setting is TT1).
See page 57 for ASSIGN INPUTS menu information.
7. Operation:
a. A heat demand is activated at 0.9VDC and turns off at 0.8VDC. 2 VDC =
17% input. 10 VDC = 100% input. These voltage settings are not adjustable.
b. OUTPUT 1 (120 VAC) is activated and deactivated as the heat demand is
turned on and off. This output is a good choice to operate the system pump.
8. NOTE: The SlimFit control can be configured to use either 0–10VDC for
target operation (see previous section) or modulation, but not both.
– 36 –
See Figure 19, page 26 for details
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Field wiring
See wiring diagrams, Figure 19, page 26 & Figure 20, page 28 (continued)
L. Multiple Boiler and BMS Connections
Terminal Strips EP11 and EP12 on Expansion Module (Expansion module, right side)
1. The boiler control is capable of multiple boiler communication and control
of up to eight (8) SlimFit boilers in one installation.
2. The expansion module is capable of BMS (Building Management System)
communication.
3. See wiring at right and in the wiring diagram (Figure 19, page 26).
4. Use shielded 3-wire cable. Do not exceed 1,000 feet wire length.
5. Boiler to Boiler wiring connections
a. Connect 3-wire cable between Boiler-to-Boiler OUT (EP11-GND,B2,A2)
on one boiler to Boiler-to-Boiler IN (EP11-GND,B3,A3) on the next boiler.
b. Continue this wiring until all boilers are interconnected.
6. MODBUS to BMS (Building Management System)
a. The control is equipped with MODBUS communication to communicate
with a BMS.
b. Use terminal EP12 (EP12-BMSA,BMSB,GND) to wire to the BMS control.
c. If the BMS uses BACnet protocol, install a BACnet converter between the
BMS and the SlimFit MODBUS-to-BMS terminals (EP12).
See Figure 19, page 26 for details
M. Additional heat demand contacts – OPTIONAL
Terminal Block P16 Pins #6 & #7 (SlimFit control module, top left)
1. Each boiler’s control module can be set to activate another heat source using its
additional heat demand dry contacts through terminal block P16 pins 6 & 7.
2. Connect these terminals to call for heat from the other heat source.
3. Set the control to activate the heat demand contacts as needed.
4. The setup is done in the priority menu for the priority that will call for the
additional heat operation. See page 56 for details.
5. Contact electrical ratings: 24 VAC or less; 0.5 amp or less.
6. See “Add’l Heat Demand” on page 54 regarding which boilers may use this
function, depending on the priority being used.
See Figure 19, page 26 for details
N. 0-10 VDC Output Section
Terminal Block P16 Pins #1 & #2 (SlimFit control module, top left)
1. The control module can be set to activate another heat source using its
0-10VDC Output through terminal block P16 pins 1 & 2.
2. Connect these terminals to 0-10VDC inputs on another heat source to control
its modulation rate.
3. Maximum electrical ratings: 10VDC; 108μ A.
4. Set the control to activate the output as needed.
5. See page 24 to configure.
See Figure 19, page 26 for details
Part number 550-100-190/0917
– 37 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Zoning with the SlimFit Control
A. Zoning with CIRCULATORS, suggested applications
Three space heating zones (no DHW)
1. Review wiring information on page 26 (120VAC
outputs) and page 31 (24VAC inputs).
2. The configuration at right uses the three input/output
pairs to receive thermostat inputs on P11-4/5, P15-1/2,
and P15-3/4; and circulator outputs on P2 as shown.
3. The factory default settings assign all inputs 1, 2 and 3
to PRIORITY 2.
4. Choose the space heating system type that matches the
heating system during the WIZARD setup or manually
in the PRIORITY 2 menu.
5. Use the factory default settings for the system type
chosen, or change if needed.
6. Factory defaults should work for other settings not listed
above.
Two space heating zones plus DHW piped
directly to boiler
1. Review wiring information on page 26 (120VAC
outputs) and page 31 (24VAC inputs).
2. The configuration at right uses INPUT 2 and 3 for
space heating thermostats. INPUT 1 uses the input
from a DHW aquastat.
3. The factory default settings assign inputs 1, 2 and 3
to PRIORITY 2. Keep inputs 2 and 3 assigned to
PRIORITY 2. To set up PRIORITY 2, choose the
space heating system type that matches the heating
system during the WIZARD setup or manually in
the PRIORITY 2 menu.
4. Assign INPUT 1 to PRIORITY 1, which is factory
default configured for DHW applications.
5. Use the factory default settings for DHW and for
the heating system type chosen, or change if needed.
6. Factory defaults should work for other settings not
listed above.
WMCR circulator zone controller plus DHW
controlled by boiler, DHW piped directly to boiler
1. Review wiring information on page 26 (120VAC
outputs) and page 31 (24VAC inputs).
2. To shut down Space Heating during DHW operation:
Provide and connect relay R1 (120VAC coil with NC
contact) to interrupt the Zone controller’s ZC-ZR
(120VAC operating circuit).
3. The configuration at right uses INPUT 2 for space
heating with the call for heat coming from the zone
controller (X-X). INPUT 1 uses the input from a
DHW aquastat.
4. The factory default settings assign inputs 1, 2 and 3 to
PRIORITY 2. Keep input 2 assigned to PRIORITY 2.
To set up PRIORITY 2, choose the space heating
system type that matches the heating system during
the WIZARD setup or manually in the PRIORITY 2
menu.
5. Assign INPUT 1 to PRIORITY 1, which is factory
default configured for DHW applications. Wire the
DHW circulator to OUTPUT 1.
6. Use the factory default settings for DHW and for
the heating system type chosen, or change if needed.
Factory defaults should work for other settings not
listed above.
– 38 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Zoning with the SlimFit Control
(continued)
B. Zoning with ZONE VALVES, suggested applications
Two space heating zones (no DHW)
1. Review wiring information on page 26 (120VAC
outputs) and page 31 (24VAC inputs).
2. The configuration at right uses INPUT 2 and 3 for
space heating thermostats. INPUT 1 is reserved
here for configuring the operation of the system
circulator.
3. The factory default settings assign inputs 1, 2 and 3
to PRIORITY 2. Keep inputs 2 and 3 assigned to
PRIORITY 2. To set up PRIORITY 2, choose the
space heating system type that matches the heating
system during the WIZARD setup or manually in
the PRIORITY 2 menu.
4. Use the factory default settings for the heating system type chosen, or change if needed.
5. Assign INPUT 1 to AUX PUMP/OUTPUT. Then
select ANY INPUT BY ITS PRIORITY when
prompted for when to activate the output. This will
cause the system pump to run when either of the
zones calls for heat. Confirm that Priority 2 RUN
AUX PUMP/OUT is set to YES.
6. INPUT 1 (P11-4/5) cannot be used for a wired connection (as shown at right) because it is being used
in the control setup to run the system circulator.
7. Factory defaults should work for other settings not
listed above.
The system must be equipped with a by-pass
pressure regulating valve. Flow can occur
with zone valves closed.
WMZV zone valve zone controller plus DHW
controlled by boiler, DHW piped directly to
boiler
1. Review wiring information on page 26 (120VAC
outputs) and page 31 (24VAC inputs).
2. The configuration at right uses INPUT 2 for space
heating with the call for heat coming from the zone
controller (X-X). INPUT 1 uses the input from a
DHW aquastat.
3. The factory default settings assign inputs 1, 2
and 3 to PRIORITY 2. Keep input 2 assigned to
PRIORITY 2. To set up PRIORITY 2, choose the
space heating system type that matches the heating
system during the WIZARD setup or manually in
the PRIORITY 2 menu.
4. The system circulator, wired to OUTPUT 2, will
turn on whenever there is a call for heat from the
zone controller.
5. Assign INPUT 1 to PRIORITY 1, which is factory
default configured for DHW applications. Wire the
DHW circulator to OUTPUT 1.
6. Use the factory default settings for DHW and
for the heating system type chosen, or change if
needed. Factory defaults should work for other
settings not listed above.
Part number 550-100-190/0917
P15, P11 and P2 are on the terminal strips
– 39 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Control operation and setup
Control setup
1. Set control parameters using the WIZARD option provided on initial
start-up or manually enter parameters using control menus (see
Figure 26, page 47 and following pages for information.)
2. See instructions beginning on page 41 for basic systems and minimum settings required (using factory defaults).
3. This manual provides set-up information for a single boiler using BASIC control setting options. See the SlimFit Advanced Manual for single-boiler advanced settings and for all multiple boiler applications.
Boiler Model, Altitude are critical settings. Failure to set correctly
could result in severe personal injury, death or substantial property
damage.
Figure 21 Control sequence of operation
Display
status
text
POWER
UP
Standby
Temperature settings — You must ensure that the Control is set for
the proper water temperatures for the system. Excessive water temperature can cause significant property damage in some applications.
Multi-temperature systems — If the heating system includes circuits
that require lower temperature water (radiant slab circuits, for example)
as well as higher temperature circuits (DHW, finned tube baseboard,
etc.), it is recommended to protect low-temperature circuits with limit
controls that are wired to an Control external limit circuit. Failure to
provide regulation can result in substantial property damage.
Blower
ON
Control features
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❏ $4%7BMWFTFUMFBLBHFUFTUGFBUVSF 4FF"EWBODFE.BOVBM ❏ Built-in 0–10 VDC signal generator to allow parallel modulation of
multiple boilers; also capable of accepting 0–10 VDC input.
❏ The boiler is equipped with a low water cutoff, factory wired to the
Control, manually reset through the Control.
Sequence of operation
1. Figure 21 is a summary of the operating sequence for the Control.
s The statuses shown appear in the display as the Control cycles the
boiler. See Figure 23, page 43 for screen shots.
s The display will flash red if a problem has been detected.
– 40 –
Ignition
Space
Heating
DHW
Heating
Blower
OFF
Control action
(Also see Figure 23, page 43)
s Check the boiler model listed on the power-up
screen. If it is not correct, turn off the boiler. See
page 48 for instructions to change setting.
s When power is turned on, the screen lists sensors
that are detected. If any sensor is not listed, make sure
it is connected correctly. Turn off power and restart.
s Standby - no calls for heat.
s Toggles through no dots, 1 dot, 2 dots, then 3 dots
while in standby (wrench symbol will show instead
if maintenance is needed).
s Call for heat detected.
s Display on with BLUE light (space heating) or
PURPLE light (DHW).
s Start min/max timers if more than one system is
calling - highest priority starts first.
s Start circulators for this priority setup based upon
settings.
s Calculate target temp — If sensor temp is below
target temp, begin firing sequence.
s Wait on closure switch.
s Blower to purge speed for prepurge.
s Min air flow switch.
s Pre-purge.
s
s
s
s
s
After prepurge times out, transition to ignition speed.
Begin ignition cycle.
Activate gas valve and ignition spark.
Continue ignition spark for ignition period.
Turn off spark and use flame rod to check for
flame signal.
s Flame detected.
s Release boiler to modulation.
s NOTE: If flame is not detected, the gas valve is
turned off, blower turns on (postpurge), and
control starts cycle again. After 2 failures, the
control locks out.
s If priority timer times out, switch to next priority
and start priority timer.
s If demand satisfied, go to postpurge.
s Flame detected.
s Release boiler to modulation.
s NOTE: If flame is not detected, the gas valve is
turned off, blower turns on (postpurge), and
control starts cycle again. After 2 failures, the
control locks out.
s If priority timer times out, switch to next priority
and start priority timer.
s If demand satisfied, go to postpurge.
s Demand satisfied (temperature reaches target
temperature or limit setting).
s Gas valve off.
s Blower to ignition speed for postpurge.
s Return to standby after purge.
s Display turns BLUE, toggling between graphic
screen and maintenance screen (occurs if maintenance schedule timer times out).
Maintenance s Will show during standby only.
s Boiler operates as normal.
s Display turns RED due to error or limit event.
s Flashing display means lockout condition.
Error/fault
WWSD
s Warm weather shut down - the boiler will not
be allowed to fire on space heating if the outside
temperature is greater than the WWSD setting.
s DHW operation is not affected by WWSD.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Control operation and setup (continued)
Control Priorities & Input/Outputs
s
s
s
For heating installations with multiple systems, the Control uses
PRIORITIES to determine the order of operation of the systems.
The control’s MAX and MIN time settings determine the maximum and minimum times a system will be operated before being
turned off to allow another system to operate. A typical example
is DHW priority — heat demand from the DHW system is given
preference over space heating, if set to use Priority 1.
Each PRIORITY has its own set of operating parameters. The
control prompts the user to select the system type (finned tube
baseboard, DHW, etc.) and is factory programmed with parameters suited to each of these system types. The user can also choose
CUSTOM to create a system type.
The Control provides up to three priorities for single boiler
applications and up to four priorities for network boiler applications. The order of operation is: PRIORITY 1, PRIORITY
2, PRIORITY 3.
Setting Up the Boiler
Step 1
s DETERMINE input/output needs –
s What are the inputs? – Thermostats, remote contacts, end
switches, etc.
s What does each control’s output need to do? – operate a
pump, activate an air louver, etc.
Step 2
s Connect wiring to the control inputs and outputs to
accomplish the purposes set in Step 1.
Step 3
s Install the boiler following all instructions in the SlimFit
Boiler Manual before proceeding further.
s See the Advanced Manual for multiple boiler installations.
s Follow instructions in the Boiler Manual to start up and
power the boiler.
Step 4
s Use the WIZARD (below) or enter control parameters
manually (skip Wizard).
s
The 120VAC power output to the boiler circulator is provided by
a relay located on the boiler’s Pump/Communications Board. For Control WIZARD
each of the priorities, the control can be setup to run the boiler
pump or to leave it off. It is recommended to set Blr Circ to OFF s The Wizard is available on initial setup of the boiler. It leads
through a step-by-step setup procedure designed for the
for DHW that is directly piped with its own DHW Circ.
application chosen.
s
Each boiler has three input/output pairs (INPUT/OUTPUT 1, s
2 and 3. Control setup prompts the user to assign each of these
I/O pairs to a PRIORITY. The Control then knows which system s
(priority) to operate when the input receives a call for heat. On
a call for heat to an input, the Control closes the corresponding
output (120VAC) and begins controlling the boilers according
to the setup for the assigned priority.
s
The MAX ON TIME setting controls the maximum time a priority will be allowed to run before switching to a lower priority’s call
for heat. The MIN ON TIME setting controls the minimum time
a priority will be operated before switching to a higher priority’s
call for heat, or the next lower priority.
Boiler
Settings
s Altitude –
– must be set correctly for proper
operation.
s WWSD – set outdoor temperature above which space
heating will be deactivated.
When multiple inputs are set up on the same priority, they will
run at the same time if the priority and inputs are active.
Inputs/
Outputs
s Select the usage of inputs 1, 2 and 3.
s Determine usage of outputs 1, 2 and 3 (outputs
correspond to inputs).
Set
Priorities
s Assign priorities 1, 2 and 3 to the inputs.
System
Settings
s Set system settings or leave at their defaults.
System
Types
s Specify what system type is connected to each of the three
outputs; each system type causes the control to preset.
operating temperatures.
s
Control operation
s
The control responds to signals from:
s Room thermostats.
s DHW aquastats (if used).
s Temperature sensors (boiler return, boiler supply, flue
temperature) and, when used, system supply and system
return, outdoor temperature). For optimal performance, it
is recommended to install the system supply and return
sensors.
s
The control automatically adjusts blower speed (and gas flow
rate) to match boiler output to space heating and/or DHW
heating demand.
Context-sensitive help is available to explain the purpose
of key setup items.
Advanced settings for single boiler applications can be accessed manually from the Contractor menu.
WIZARD Sequence
Output
Activation
s (When applicable) Select when to activate AUX PUMP/
Priority
Switching
s Set maximum and minimum timings for priorities.
OUTPUT – by input, always on, external switch, etc.
s
The control provides three inputs and three outputs (for circulators or auxiliary devices) plus a fourth boiler circulator output.
Date/Time
s Set date and time – important for control diagnostic
logging.
s
The outdoor temperature is used for supply temperature reset
operation and for the warm weather shut down (WWSD) option.
Information
s
System presets:
s The Control provides presets by system type (see
Figure 25, page 46 for complete list).
s Set installer name and contact information.
s Enter CP#, install date, maintenance date, etc.
s Set automatic maintenance notification timing.
Part number 550-100-190/0917
– 41 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
SlimFit Control — INITIAL SCREENS
Figure 22 Initial navigation — Accessing CONTRACTOR menus (multiple-boiler screens shown)
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Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Control operation
(continued)
Figure 23 SlimFit control display screens and typical navigation – Advanced mode, multiple boilers
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– 43 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Available control settings – Advance Mode
Figure 24 SlimFit control settings available in ADVANCED MODE (see Boiler Manual for BASIC MODE settings)
Menus and Items
Default setting
Range/options
s RESET FACTORY DEFAULT
Factory set
Single
No
200°F
70°F
0°F
ALL ON
ONLY BOILER CIRCULATOR ON
—
All SlimFit models available
Single, Master or Shadow
Yes or No
50 to 200°F
OFF, 50–100°F
-10 to +10°F
ON or OFF for each circulator
ON or OFF for each circulator
—
PRIORITY menus (page 53)
Default setting
Range/options
Varies by priority
Varies by priority
Varies
Varies
Varies by system type
Varies by system type
70°F
0°F
10V
0V
OFF
Varies (5 or 10°F)
10°F
Equals SUPPLY MAX
5°F
5°F
2 minutes
5 minutes
60 seconds
60 seconds
5°F
5°F
30 minutes
15 minutes
Varies by system
Varies by system
OFF
30 seconds
96%
17%
AUTO
1
1, 2, 3
See Figure 25, page 46 for choices
System Supply or Boiler Out
None, 0–10V, or ODT
60 to 190°F
60 to 190°F
50 to 100°F
-20 to 50°F
5V-10V
0V-4.9V
OFF, 1 to 240 minutes
2 to 15°F
2 to 15°F
60 to 190°F
2 to 10°F
2 to 10°F
1 to 15 minutes
3 to 30 minutes
30 to 240 seconds
30 to 240 seconds
2 to 20°F
2 to 10°F
OFF, 1 to 240 minutes
OFF, 1 to 240 minutes
YES or NO
YES or NO
OFF, 1 to 240 seconds
OFF, 1 to 240 seconds
100% to 21%
17% to 99%
AUTO or 100 to 32,000 MBTU’s
1 to 8
BOILER SETTINGS Menu (page 48)
s BOILER MODEL
s CONTROL TYPE
s HIGH ALTITUDE
s HIGH LIMIT TEMP
s WWSD TEMP
s ADJUST OUTDOOR
s CIRCULATOR EXERCISING
s FREEZE PROTECT CIRCS
s INPUTS ASSIGNED
s SYSTEM TYPE
s TARGET MOD SENSOR
s TARGET ADJUST
s SUPPLY MAX
s SUPPLY MIN
s OD RESET MAX
s OD RESET MIN
s VOLTS FOR MAX
s VOLTS FOR MIN
s BOOST TIME
s SYSTEM OFF DIFF
s SYSTEM ON DIFF
s MAX BLR TEMP
s ADD BLR DIFF
s DROP BLR DIFF
s MOD DELAY TIME
s STABILIZE TIME
s ADD DELAY TIMER
s DROP DELAY TIMER
s BOILER ON DIFF
s BOILER OFF DIFF
s MAX ON TIME
s MIN ON TIME
s RUN BOILER PUMP
s RUN AUX PUMP/OUTPUT
s PRE PUMP
s POST PUMP
s MAX RATE (Local priorities only)
s MIN RATE
s MAX SYS MBH (Network priorities only)
s MIN BOILERS (Network priorities only)
See detailed information about controls settings (parameters) on the following pages.
– 44 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Available control settings – Advance Mode
(continued)
Figure 26 SlimFit control settings available in ADVANCED MODE, continued
Menus and Items
Default setting
Range/options
s ACTIVATE CONTACT
(ADDITIONAL HEAT DEMAND)
OFF
OFF, 1st, 2nd, ODT
s RESPONSE TIME
(ADDITIONAL HEAT DEMAND)
OFF
OFF, 1 to 240 minutes
10V
2.0V
No
15º
5.0V - 10.0V
0.50V - 4.9V
Yes or No
0º - 50º
1st
1st or 2nd
Default setting
Range/options
—
—
30
15
96%
17%
Single, Master, Shadow
1 to 8
Off, 1 to 240
Off, 1 to 240
100% to 18%
17% to 99%
s MAX RATE VOLTS
s MIN RATE VOLTS
s TEMP DEPENDENT
s ODT SETPOINT
s ACTIVATE CONTACT BELOW SETPOINT:
NETWORK SETTINGS (page 49)
s CONTROL TYPE
s BOILER ADDRESS
s NET MAX ON TIME
s NET MIN ON TIME
s MAX RATE ON NET
s MIN RATE ON NET
ROTATION AND SEQUENCE (page 50)
s SEQUENCE TYPE
s BASERATE HIGH
s BASERATE LOW
s LEAD BOILER ROTATE
s ROTATE FREQ
s FORCE LEAD ROTATE
s CURRENT ORDER
ASSIGN INPUTS (page 57)
Default setting
Range/options
Smart
Auto
30%
Total Hours
Yes
—
Smart, Parallel, Series
Auto, 17% to 100%
30% to 100%
Off, By Boiler, Total Hours, Incremental Hours
1-30, 60, 90, 120, 150, 180, 210, 240, 270,
300, 330, 365
Yes or No
Shows current rotation sequence
Default setting
Range/options
7
Single boiler – PRIORITY 2
Master or shadow boiler – NETWORK 2
Single boiler – PRIORITY 2
Master or shadow boiler – NETWORK 2
Single boiler – PRIORITY 2
Master or shadow boiler – NETWORK 2
s INPUT 1
s INPUT 2
s INPUT 3
NONE or
Single boiler – PRIORITY 1, 2, or 3
Master or shadow boiler –
NETWORK PRIORITY 1 or 2 or
LOCAL PRIORITY 1 or 2
DIAGNOSTICS (see Boiler Manual)
MAINTENANCE (page 59)
SET DATE AND TIME (page 59)
GAS VALVE TEST (see Boiler Manual)
See detailed information about controls settings (parameters) on the following pages.
Part number 550-100-190/0917
– 45 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
SYSTEM TYPE presets
Figure 25 System types available (each option provides factory presets for operating parameters)
Supply
Max °F
Max Blr
Temp °F)
OD Reset
Min °F
Supply
Min °F
OD Reset
Max °F
Run
Boiler
Pump
Run System
Pump/Aux
FCL
180
180
0
140
70
YES
YES
FIN BASE
FTB
180
180
0
130
70
YES
YES
Cast Iron Baseboard
IRONBASE
CIB
180
180
0
120
70
YES
YES
Cast Iron Radiators
RADIATOR
CIR
180
180
0
120
70
YES
YES
Radiant - slab on grade RAD SLAB
RSG
120
120
0
80
70
YES
YES
Radiant - thin slab
RAD SLAB
RTS
140
140
0
80
70
YES
YES
Radiant - below floor
(staple up)
RADFLOOR
RSU
160
160
0
90
70
YES
YES
Radiant - above floor
(sleeper system)
RADFLOOR
RAF
140
140
0
90
70
YES
YES
Domestic Hot Water
DOMESTIC
DHW
180
180
N/A
N/A
N/A
NO
NO
Custom (user defined)
XXXXXXXX
(user input)
first three
of user
input
180
180
0
70
70
YES
YES
System Type
8-Character 3-Character
Abbreviation Abbreviation
Fan-coil
FAN-COIL
Finned Tube Baseboard
– 46 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
CONTRACTOR menus
Boiler Model, Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See the following pages for explanations of control setting
options.
Figure 26 SlimFit control menu access — accessing CONTRACTOR menu
PURPOSE
USER MODE
s Set this to ADVANCED to access single boiler advanced
settings. ADVANCED mode is automatic if configuring
network boilers.
s Set/change boiler model, control type, high
altitude setting, gas type NAT only, ODT
sensor requirement, manual reset, high limit
BOILER SETTINGS
and WWSD temperature settings, outdoor
sensor temp adjustment, circulator exercising, freeze protection setup, and restore to
factory default option.
See page 48
s These settings control operating temperatures and behaviors for inputs that are
assigned to PRIORITY 1.
See page 53
s These settings control operating temperatures and behaviors for inputs that are
assigned to PRIORITY 2.
See page 53
s These settings control operating temperatures and behaviors for inputs that are
assigned to PRIORITY 3.
See page 53
s Appears only on multiple boiler systems.
s These settings control operating temperatures and behaviors for inputs that are
assigned to PRIORITY 4.
See page 53
ASSIGN INPUTS
s These settings assign Priority 1, 2, 3 or 4 to
each of the three inputs to the control.
See page 57
DIAGNOSTICS
s View error counters and historical information including previous lockouts.
s View current status of temperatures, inputs,
outputs and runtimes; View network information; View MODBUS communication
info; View software versions; Access manual
test mode screen; Initiate manual reset.
See
Boiler
Manual
MAINTENANCE
INFO
s Used to set contractor contact information,
boiler information and maintenance dates.
See page 59
SET TIME & DATE
s Use to set date and time — important since
fault occurrences are date/time stamped.
See page 59
MODBUS
SETTINGS
s Use to enter Modbus communications information (enable/disable, range, parity and
stop bits, and baud rate).
s For Modbus addressing information, see
SlimFit Modbus Supplement.
GAS VALVE
TEST
s Use to enable/disable gas valve relay 1 and 2
for troubleshooting purposes.
PRIORITY 1
(LOCAL PRIORITY 1)
PRIORITY 2
(NETWORK PRIORITY 1
or LOCAL PRIORITY 2)
PRIORITY 3
(NETWORK PRIORITY 2
or LOCAL PRIORITY 3)
PRIORITY 4
(LOCAL PRIORITY 2)
Screens shown above are typical only.
Actual screens depend on control
settings chosen.
Part number 550-100-190/0917
More
information
MENU ITEM
See
SlimFit
MODBUS
Supplement
– 47 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
BOILER SETTINGS menu
Boiler Model, Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See Figure 26, page 47 for the screen sequences up to the
CONTRACTOR menu.
Figure 27 SlimFit ADVANCED mode BOILER SETTINGS options (see Figure 26, page 47 to access CONTRACTOR menu)
MENU ITEM
DESCRIPTION
s
MUST be set to correct model.
s Check the boiler model against the model listed on the boiler’s rating plate. Change the selection to the correct model
BOILER MODEL
if not. Also verify the model number on the SlimFit control
display at power-up. Failure to correct would result in severe
personal injury, death or substantial property damage.
CONTROL TYPE s
s
HIGH ALTITUDE
Select single, master or shadow.
If the boiler is installed at an altitude above 5500
feet, select YES for high altitude. The control will automatically adjust firing rates (blower speeds) to compensate for altitude. Altitude MUST be set correctly to avoid risk of severe
personal injury, death or substantial property damage.
MANUAL RESET s If boiler outlet water temperature exceeds this temperature,
HIGH LIMIT
the SlimFit control will shut down the boiler and enter lockout. Changing this setting is NOT recommended.
TEMP
WWSD TEMP
s WWSD stands for warm weather shutdown. It means the
boiler will not be allowed to fire if the outside temperature is
greater than the WWSD setting.
When the boiler is kept off because the outside temperature is
above WWSD, the graphic display will show WWSD, and the
boiler will remain in standby until the outside temperature
drops below WWSD temperature.
WWSD does not apply to DHW systems.
The outdoor sensor must be installed to use this function.
Any setting other than OFF will cause the control to look for
a sensor. It will display an error if a sensor is not detected.
ADJUST
OUTDOOR
s Use this setting to calibrate the outdoor sensor when needed
to compensate for variations in lead length or other factors
that could affect total resistance in sensor circuit.
CIRCULATOR
EXERCISING
s For each circulator, select whether you want the control to
automatically start the circulator and run for 10 seconds for
each 72-hour period of inactivity.
FREEZE
PROTECT
CIRCS
s This function automatically starts the circulators chosen if the
heat exchanger sensors detect a temperature less than 45°F. In
addition, the burner is turned on if temperature drops below
40°F. Circulators and burner turn off when the temperature
rises above 48°F.
RESET
FACTORY
DEFAULTS
s Use this function to restore all control settings to factory
default values — will require complete restart and setup of
control after resetting. Record information from the MAINTENANCE screen and any history information that may be of
use in the future. ALL stored data is eliminated when reset to
defaults, except for boiler model number.
Screens shown above are typical only.
Actual screens depend on control
settings chosen.
– 48 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
NETWORK SETTINGS menu
Boiler Model and Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See Figure 26, page 47 for the screen sequences up to the
CONTRACTOR menu.
Figure 28 SlimFit NETWORK SETTINGS menu (see Figure 26, page 47 to access CONTRACTOR menu)
More
information
MENU ITEM
PURPOSE
CONTROL TYPE
s SINGLE, MASTER or SHADOW
s If another boiler has already been selected
as master, a notice window will appear if
MASTER is selected here.
None
BOILER
ADDRESS
s Network address of boiler (can be changed
here if desired, but every boiler must have a
unique address).
None
NET MAX ON
TIME
s Maximum amount of time this boiler will
operate on a network call for heat from the
Master boiler before switching to a LOCAL
PRIORITY 2 demand (if no LOCAL PRIORITY 1 demand is present).
None
s Minimum amount of time this boiler will
operate on a network call for heat from the
NET MIN ON TIME
Master boiler before switching to a LOCAL
PRIORITY 1 demand.
None
MAX RATE ON
NET
s Maximum rate the boiler will run at during
NETWORK calls.
None
MIN RATE ON
NET
s Minimum rate the boiler will run at during
NETWORK calls.
None
ROTATION &
SEQUENCE
s Select the method by which the boilers will
See
turn on and off.
Figure 30, page 51
s Choose between SMART, PARALLEL, or for explanation of
SERIES. (This setting is only accessible on sequencing options
Master boiler.)
Screens shown above are typical only.
Actual screens depend on control
settings chosen.
Part number 550-100-190/0917
– 49 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
ROTATION AND SEQUENCE
Boiler Model, Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See Figure 26, page 47 for the screen sequences up to the
CONTRACTOR menu.
Figure 29 SlimFit NETWORK SETTINGS menu (see Figure 26, page 47 to access CONTRACTOR menu)
MENU ITEM
PURPOSE
s Select the method of which the boilers will turn on and off.
Choose between SERIES, PARALLEL, or SMART. SERIES
sequencing allows each boiler to reach full input before
bringing on the next boiler in sequence. PARALLEL sequencing
uses a limiter, called BASERATE HIGH, to limit the firing
SEQUENCE TYPE
rate before adding additional boilers. SMART sequencing
(factory default setting) uses a low firing rate setting, called
BASERATE LOW, to keep boilers at a low firing rate, bringing
on additional boilers at reduced rate until all boilers are on if
necessary. Boilers are then allowed to modulate together as
high as necessary to meet demand.
BASERATE HIGH
s This sets highest modulation rate before turning on the next
boiler.
s This is read-only if in SMART mode.
BASERATE LOW
s This sets rate that the next boiler in sequence is going to turn
on when called.
s This is only visible if the Sequence Type is selected as SMART.
s It is recommended that Baserate Low be set at least 10% greater
than the Min Rate of any boiler on the network.
s Choose how to rotate the boiler sequencing. Choose either
OFF, BY BOILER ID, TOTAL HOURS, or INCREMENTAL
HOURS. Firing sequence is changed every rotation period
(ROTATE FREQ – see setting explanation below).
s OFF — Master boiler is always the first to fire. Others fire in
the order of their network ID.
LEAD BOILER
ROTATE
s BY BOILER ID — Lead boiler toggles in the sequence of network ID numbers (changes from boiler number 1 to number
2, then boiler number 2 to number 3, etc.).
s TOTAL HOURS — The boiler with the most lifetime operating
hours is moved to the last in the firing sequence. The boiler with
the least lifetime operating hours is made first in the sequence.
Others are ordered by their respective lifetime operating hours.
s INCREMENTAL HOURS — Firing sequence is based on
the operating time during the previous rotation period. The
boiler with the least operating time is started first; the boiler
with the most operating time is started last; all others are
started in order of their operating time.
Screens shown above are typical only.
Actual screens depend on control
settings chosen.
– 50 –
ROTATE FREQ
s Recalculates the boiler order every ## days based on LEAD
BOILER ROTATE setting.
FORCE LEAD
ROTATE
s Select YES or NO. When the rotation frequency timer expires
and the new order is calculated, this forces off the boiler lowest in the sequence. Then the boiler highest in the sequence
fires to replace it.
CURRENT
ORDER
s Shows the current firing order of the boilers on the network.
s This list updates based on how many boilers are detected and
the order of sequence based on the above settings.
s Sequence is shown as left-most boiler is first to turn on. Rightmost boilers are the first to turn off.
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
ROTATION AND SEQUENCE
(continued)
Figure 30 SlimFit sequencing options — SMART, PARALLEL or SERIES (examples shown for 3-boiler network)
SERIES Sequencing
PARALLEL Sequencing
SMART Sequencing
Higher Part-Load Efficiency
Quicker Boiler Response Time
STAGE 1 – Lead boiler modulates up to a maximum of 100% before turning on the next boiler in the sequence. The STABILIZE
TIME allows time for the boilers to modulate to meet system
demand before turning on additional boilers.
STAGE 1 – Lead boiler modulates up to a maximum of Base
Rate High before turning on the next boiler in the sequence.
The STABILIZE TIME allows time for the boilers to modulate
to meet system demand before turning on additional boilers.
STAGE 1 – Lead boiler modulates up to a low firing rate before
turning on the next boiler in the sequence. The STABILIZE TIME
allows time for the boilers to modulate to meet system demand
before turning on additional boilers.
STAGE 2 – Boiler #2 in sequence ignites and both boilers
modulate to so their combined energy output matches the energy
output of Boiler #1 at 100%. After a short MOD DELAY TIME,
the boilers will be released to modulate.
STAGE 2 – Boiler #2 in sequence ignites and both boilers
modulate to so their combined energy output matches the energy
output of Boiler #1 at Base Rate High. After a short MOD DELAY
TIME, the boilers will be released to modulate.
STAGE 2 – Boiler #2 in sequence ignites and both boilers modulate to BASE RATE LOW. After a short MOD DELAY TIME, the
boilers will be released to modulate.
STAGE 3 – Both boilers modulate up to a maximum of 100% before turning on the next boiler in the sequence. The STABILIZE
TIME allows time for the boilers to modulate to meet system
demand before turning on additional boilers.
STAGE 3 – Both boilers modulate up to a maximum of Base
Rate High before turning on the next boiler in the sequence.
The STABILIZE TIME allows time for the boilers to modulate
to meet system demand before turning on additional boilers.
STAGE 3 – Both boilers modulate up to a low firing rate before
turning on the next boiler in the sequence. The STABILIZE TIME
allows time for the boilers to modulate to meet system demand
before turning on additional boilers.
STAGE 4 – Boiler #3 in sequence ignites and then all boilers
modulate to so their combined energy output matches the energy
output of Boilers #1 and #2 at 100%. After a short MOD DELAY
TIME, the boilers will be released to modulate.
STAGE 4 – Boiler #3 in sequence ignites and then all boilers
modulate to so their combined energy output matches the energy
output of Boilers #1 and #2 at Base Rate High. After a short MOD
DELAY TIME, the boilers will be released to modulate.
STAGE 4 – Boiler #3 in sequence ignites and then all boilers
modulate to BASE RATE LOW. After a short MOD DELAY TIME,
the boilers will be released to modulate.
STAGE 5 – After all available boilers are firing, boilers are release
to modulate up to 100% of rate.
STAGE 5 – After all available boilers are firing, boilers are release
to modulate up to 100% of rate.
STAGE 5 – After all available boilers are firing, boilers are release
to modulate up to 100% of rate.
Part number 550-100-190/0917
– 51 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
ROTATION AND SEQUENCE
(continued)
Figure 31 Boiler sequencing — adding and dropping boilers
– 52 –
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Network Boiler PRIORITY menus
Boiler Model, Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See Figure 26, page 47 for the screen sequences up to the
CONTRACTOR menu.
x
x
x
x
x
x
x
x
x
TARGET ADJUST
x
x
x
x
SUPPLY MAX
x
x
x
x
SUPPLY MIN
x
x
x
x
OD RESET MAX
x
x
x
x
OD RESET MIN
x
x
x
x
VOLTS FOR MAX
x
x
x
x
VOLTS FOR MIN
x
x
x
x
BOOST TIME
x
x
SYSTEM OFF DIFF
x
x
SYSTEM ON DIFF
x
x
ADD BLR DIFF
x
x
DROP BLR DIFF
x
x
MOD DELAY TIME
x
x
STABILIZE TIME
x
x
ADD DELAY TIMER
x
x
DROP DELAY TIMER
x
x
MAX BLR TEMP
x
x
BOILER ON DIFF
x
x
Network
Priority 2
Local
Priority 2
x
x
Network
Priority 1
Local
Priority 1
Figure 32 SlimFit Network Boiler PRIORITY menus (access menus from CONTRACTOR menu
x
MENU ITEM
DESCRIPTION
INPUTS ASSIGNED
s List of inputs assigned to this priority/system on the local boiler (appears as 1, 2, 3).
s Select the system type for this PRIORITY, based on the heating terminal units in the
system. Use the CUSTOM selection to set the control for a different system type. The
factory preset values for SUPPLY MAX, SUPPLY MIN, OD RESET MAX and OD RESET
MIN are chosen based on the normal best setting for the terminal units. See page 46.
s Read only — shows whether boiler modulates based on System Supply sensor (network
priority) or Boiler Outlet sensor (local priority).
s Select how target temperature is calculated by control: NONE (no reset, fixed target
temperature), 0–10V (target temperature based on analog input from remote source),
ODT (outdoor reset operation).
s Set SUPPLY MAX to the required supply water temperature for the system at design
maximum heat loss (typically 180°F for finned tube baseboard on new installations.)
s SUPPLY MIN should equal the desired minimum supply water temperature for the
system. This line will not show if Target Adjust is selected as NONE.
s Appears if TARGET ADJUST is set to ODT. Outdoor temperature at which the target
temperature reaches its minimum value – usually set at the balance point temperature
for the building. (Does not appear if 0–10V or NONE is selected for Target Adjust.)
s Appears if TARGET ADJUST is set to ODT. Outdoor temperature at which the target
temperature reaches its maximum value – usually set at the outdoor design temperature
for the installation. (Does not appear if 0–10V or NONE is selected for Target Adjust.)
s Appears if 0–10V is selected for Target Adjust. Set the voltage at which SUPPLY MAX
temperature is required.
s Appears if 0–10V is selected for Target Adjust. Set the voltage at which SUPPLY MIN
temperature is required. For voltages between Min and Max, the target temperature
will be adjusted on a linear curve.
s Every time the call for heat surpasses this duration of time the target temp will increase
(boost) up 10°F to a maximum temperature of SUPPLY MAX.
s This is the amount the temperature must rise above system target to turn the boiler(s) OFF.
s This is the amount the temperature must drop below system target to begin network modulation routine. (This line may NOT appear, depending on TARGET ADJUST setting.)
s If the system supply temperature has not reached target minus this differential at the
end of the STABILIZE TIME, the control will turn on the next available boiler in the
boiler firing order.
s If the system supply temperature rises to more than target plus this differential, the
control will turn off the last firing boiler in the boiler firing order. Drop Delay Timer
limits how quickly multiple boilers drop off.
s The time allowed for the boilers to adjust to the requested firing rate before beginning
Stabilize Time and resuming modulation.
s The time allowed for all boilers actively heating a network priority to reach target modulation rate requested by the master. If the timer expires and system temperature is less than
target – ADD BLR DIFF, the master will add the next available boiler. If there are no more
available boilers, the master will freely modulate the boilers to satisfy the heat demand.
s Timer starts when the modulation rate of all boilers actively heating a network priority
are at BASE RATE HIGH, MAX RATE FOR NET, or are being self-limited. If the timer
expires and system temperature is less than target – ADD BLR DIFF, the master will add
the next available boiler.
s Minimum time before a boiler will be dropped off. This timer only begins after the first
boiler has been dropped. It applies as each additional firing boiler is dropped.
s If the boiler outlet temperature approaches [MAX BOILER TEMP – BOILER ON DIFF]
before the system supply temperature reaches its target, the control will modulate the
boiler based on the boiler outlet temperature. The boiler will cycle and modulate based
on the boiler ON and OFF differential settings. (This line does NOT appear if Target
Mod Sensor is set to Boiler Out).
s This is the amount the temperature must drop below target (or Boiler Max) to turn
the boiler ON.
SYSTEM TYPE
TARGET MOD
SENSOR
Part number 550-100-190/0917
– 53 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Network Boiler PRIORITY menus (continued)
Local
Priority 1
Local
Priority 2
Network
Priority 1
Network
Priority 2
Figure 34 SlimFit PRIORITY menus, continued
x
x
x
x
MENU ITEM
DESCRIPTION
x
x
x
x
x
x
x
x
ADD’L HEAT
DEMAND
ACTIVATE CONTACT
x
x
x
x
RESPONSE TIME
x
x
x
x
MAX RATE VOLTS
s This is the amount the temperature must rise above target (or Boiler Max) to turn the
boiler OFF.
s Maximum time boiler will run on this priority if it is being asked to run on another
priority. Will rotate among all priorities its being asked to run. Network boilers are also
controlled by NET MAX ON TIME (see Figure 28, page 49).
s NETWORK PRIORITY 1 only — Maximum time master will operate the network on
NETWORK PRIORITY 1 if NETWORK PRIORITY 2 is calling for heat.
s
When the master boiler detects a local call for heat from any boiler that is currently
operating for a network demand, the master control will allow that boiler to switch to its
local priority and replace the lost network energy of that boiler appropriately.
s Minimum time the boiler will run on an existing priority before switching to a lower
priority, or back to an existing higher priority. If a new higher priority is called during
MIN ON TIME, the boiler will immediately switch to actively heat the higher priority.
Network boilers are also controlled by NET MIN ON TIME (see Figure 28, page 49).
s NETWORK PRIORITY 2 only — Minimum time master will operate on a network priority 2 if network priority 1 is calling for heat.
s Selects whether the Boiler Pump is turned on while running on this priority.
s When set to YES, input/output pairs on any network boiler assigned as AUX PUMP/
OUPUT -> ANY TT INPUT BY ITS PRIORITY, will activate. Set this to NO for priorities
that do not need this AUX PUMP/OUTPUT to be active.
s Time associated PUMPS and AUX PUMP/OUTPUT are run before entering prepurge.
s Time associated PUMPS and AUX PUMP/OUTPUT are run after the call for heat has
ended and before switching to another call for heat.
s Limits the energy allowed by the boiler network to be put into this priority’s system.
The default is set to AUTO (the sum of all network boiler sizes). If the total size of the
boiler network is too large for a system, adjust MAX SYS MBH lower to the appropriate
energy. MAX SYS MBH can be set greater than AUTO if more SlimFit boiler are planned
to be installed to the same network. This setting can be adjusted in 100 MBH increments
(100 MBH = 100,000 BTU/hour).
s The Master turns on this many boilers in the network on an initial call for heat in order to
avoid delays due to accumulative wait times between boilers. When switching to another
network priority, MIN BOILERS is re-evaluated based on the other priority’s setting.
s Maximum rate this boiler will modulate up to while running on this priority.
s Minimum rate this boiler will modulate down to while running on this priority.
s If this is set to 1st: Immediately on a call for heat, the heat demand contacts close and
the RESPONSE TIME timer starts. If the call for heat from this demand is still active
at the end of the Response Time and the system has not reached [Target Temp - System
On Diff], the boiler system will start. If the system temperature is within this range, the
boiler system will not start unless the temperature drops below this value. The add'l heat
demand contact opens when the heat demand turns off.
s If this is set to 2nd: The boiler system starts immediately on a call for heat and starts the
RESPONSE TIME timer. If the call for heat is still active when the RESPONSE TIME
expires, the boiler will close its additional heat demand contact.
s Timers reset when priorities are switched.
s If this is set to ODT: The boiler system and AHD will operate according to the setting of
ACTIVATE CONTACT below setpoint and ODT setpoint temperature. See page 55 for
more details of operation.
s NETWORK PRIORITY 1 or 2 — The additional heat demand must be wired to the
master boiler.
s LOCAL PRIORITY 1 or 2 — The additional heat demand must be wired to the individual
boiler. A master boiler cannot use additional heat demand on a local priority.
s Time to wait for system to respond before taking the Activate Contact action. If ACTIVATE
CONTACT is OFF, this line does not appear.
s The voltage that correspond to the highest modulation rate the boiler will operate at.
x
x
x
x
MIN RATE VOLTS
s The voltage that correspond to the lowest modulation rate the boiler will operate at.
x
x
x
x
TEMP. DEPENDENT
s AHD will use system supply temperature as a shutoff point if system temperature gets to
the priority specific Max. Supply temperature and SYS OFF DIFF.
x
x
x
x
ODT SETPOINT
s Used as a switching point to operate AHD as first or second. If ACTIVATE CONTACT
below setpoint is set to 1st, the AHD contact activates as 1st below the ODT setpoint
temperature and as 2nd above it, the reverse is true if selected as 2nd.
x
x
x
x
ACTIVATE CONTACT
BELOW SETPOINT
s The ODT setpoint temperature and as 2nd above it, the reverse is true if selected as 2nd.
x
x
x
BOILER OFF DIFF
MAX ON TIME
x
MIN ON TIME
x
x
x
x
x
x
RUN AUX PUMP/
OUTPUT
x
x
x
x
PRE PUMP
x
x
x
x
POST PUMP
x
x
MAX SYS MBH
x
x
MIN BOILERS
– 54 –
RUN BOILER PUMP
MAX RATE
MIN RATE
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Single Boiler PRIORITY menus
Boiler Model, Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See Figure 28, page 49 for the screen sequences up to the
CONTRACTOR menu.
Priority 1
Priority 2
Priority 3
Figure 33 SlimFit single boiler PRIORITY menus (access menus from CONTRACTOR menu
MENU ITEM
x
x
x
INPUTS ASSIGNED
s List of inputs assigned to this priority/system on the local boiler (appears as 1, 2, 3).
x
x
x
SYSTEM TYPE
s Select the system type for this PRIORITY, based on the heating terminal units in the system.
Use the CUSTOM selection to set the control for a different system type. The factory preset
values for SUPPLY MAX, SUPPLY MIN, OD RESET MAX and OD RESET MIN are chosen
based on the normal best setting for the terminal units. See page 46.
x
x
x
TARGET MOD
SENSOR
s Select whether boiler modulates based on System Supply sensor or Boiler Outlet sensor.
x
x
x
TARGET ADJUST
s Select how target temperature is calculated by control: NONE (no reset, fixed target temperature), 0–10VDC (target temperature based on analog input from remote source), ODT (outdoor
reset operation). This setting cannot be selected if system type is DHW.
x
x
x
SUPPLY MAX
s Set SUPPLY MAX to the required supply water temperature for the system at design maximum
heat loss (typically 180°F for finned tube baseboard on new installations.)
x
x
x
SUPPLY MIN
s SUPPLY MIN should equal the desired minimum supply water temperature for the system.
This line will not show if Target Adjust is selected as NONE.
x
x
x
OD RESET MAX
s Appears if TARGET ADJUST is set to ODT. Outdoor temperature at which the target temperature reaches its minimum value – usually set at the balance point temperature for the building.
x
x
x
OD RESET MIN
s Appears if TARGET ADJUST is set to ODT. Outdoor temperature at which the target temperature reaches its maximum value – usually set at the outdoor design temperature for the
installation.
x
x
x
VOLTS FOR MAX
s Appears if 0–10V is selected for Target Adjust. Set the voltage at which SUPPLY MAX temperature is required.
x
x
x
VOLTS FOR MIN
s Appears if 0–10V is selected for Target Adjust. Set the voltage at which SUPPLY MIN temperature is required. For voltages between Min and Max, the target temperature will be adjusted
on a linear curve.
x
x
x
BOOST TIME
s Every time the call for heat surpasses this duration of time the target temp will increase (boost)
up 10°F to a maximum temperature of SUPPLY MAX.
x
x
x
SYSTEM OFF DIFF
s This is the amount the temperature must rise above system target to turn the boiler OFF. (This
line does NOT appear if Target Mod Sensor is set to Boiler Out).
x
x
x
SYSTEM ON DIFF
s This is the amount the temperature must drop below system target to turn the boiler ON.
(This line does NOT appear if Target Mod Sensor is set to Boiler Out).
Part number 550-100-190/0917
DESCRIPTION
– 55 –
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
Single Boiler PRIORITY menus (continued)
Priority 1
Priority 2
Priority 3
Figure 36 SlimFit single boiler PRIORITY menus, continued
MENU ITEM
x
x
x
MAX BLR TEMP
s If the boiler outlet temperature approaches [MAX BOILER TEMP – BOILER ON DIFF] before
the system supply temperature reaches its target, the control will modulate the boiler based on
the boiler outlet temperature. The boiler will cycle and modulate based on the boiler ON and
OFF differential settings. (This line does NOT appear if Target Mod Sensor is set to Boiler Out).
x
x
x
BOILER ON DIFF
s This is the amount the temperature must drop below target to turn the boiler ON.
x
x
x
BOILER OFF DIFF
s This is the amount the temperature must rise above target to turn the boiler OFF.
x
x
MAX ON TIME
s Maximum time this boiler will run on this priority if it is being asked to run on another priority.
Will rotate among all priorities its being asked to run.
DESCRIPTION
x
x
MIN ON TIME
s Minimum time the boiler will run on an existing priority before switching to a lower priority,
or back to an existing higher priority. If a new higher priority is called during MIN ON TIME,
the boiler will immediately switch to actively heat the higher priority.
x
x
x
RUN BOILER PUMP
s Selects whether the Boiler Pump is turned on while running on this call for heat.
x
x
x
RUN AUX PUMP/
OUTPUT
s When set to YES, any input/output pairs assigned as AUX PUMP/OUPUT -> ANY TT INPUT
BY ITS PRIORITY, will activate. Set this to NO for priorities that do not need this AUX PUMP/
OUTPUT to be active.
x
x
x
PRE PUMP
s Time associated PUMPS and AUX PUMP/OUTPUT are run before entering prepurge.
x
x
x
POST PUMP
s Time associated PUMPS and AUX PUMP/OUTPUT are run after the call for heat has ended
and before switching to another call for heat.
x
x
x
MAX RATE
s Maximum rate this boiler will modulate up to while running on this priority.
x
x
x
MIN RATE
s Minimum rate this boiler will modulate down to while running on this priority.
x
x
x
ADD’L HEAT
DEMAND
ACTIVATE CONTACT
s If this is set to 1st: Immediately on a call for heat, the heat demand contacts close and the
RESPONSE TIME timer starts. If the call for heat from this demand is still active at the end
of the Response Time and the system has not reached [Target Temp - System On Diff], the
boiler system will start. If the system temperature is within this range, the boiler system will
not start unless the temperature drops below this value. The add’l heat demand contact opens
when the heat demand turns off.
s If this is set to 2nd: The boiler system starts immediately on a call for heat and starts the RESPONSE TIME timer. If the call for heat is still active when the RESPONSE TIME expires, the
boiler will close its additional heat demand contact.
s Timers reset when priorities are switched.
s If this is set to ODT: The boiler system and AHD will operate according to the setting of
ACTIVATE CONTACT below setpoint and ODT setpoint temperature. See page 55 for more
details of operation.
s NETWORK PRIORITY 1 or 2 — The additional heat demand must be wired to the master boiler.
s LOCAL PRIORITY 1 or 2 — The additional heat demand must be wired to the individual
boiler. A master boiler cannot use additional heat demand on a local priority.
x
x
x
RESPONSE TIME
s Time to wait for system to respond before taking the Activate Contact action. If ACTIVATE
CONTACT is OFF, this line does not appear.
x
x
x
MAX RATE VOLTS
s The voltage that correspond to the highest modulation rate the boiler will operate at.
x
x
x
MIN RATE VOLTS
s The voltage that correspond to the lowest modulation rate the boiler will operate at.
x
x
x
TEMP. DEPENDENT
s AHD will use system supply temperature as a shutoff point if system temperature gets to the
priority specific Max. Supply temperature and SYS OFF DIFF.
x
x
x
ODT SETPOINT
s Used as a switching point to operate AHD as first or second. If ACTIVATE CONTACT Below
Setpoint is set to 1st, the AHD contact activates as 1st below
x
x
x
ACTIVATE CONTACT
BELOW SETPOINT
s The ODT setpoint temperature and as 2nd above it, the reverse is true if selected as 2nd.
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Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
ASSIGN INPUTS menu
Boiler Model, Altitude are critical settings.
Failure to set correctly could result in severe personal injury, death or substantial property damage.
1. Access contractor menus by pressing and holding the UP and
DOWN arrow keys at the same time for 7 seconds.
2. See Figure 28, page 49 for the screen sequences up to the
CONTRACTOR menu.
Figure 34 SlimFit Assign Inputs menu (see Figure 28, page 49 to access CONTRACTOR menu)
MENU
ITEM
PURPOSE
Overview
s There are three inputs/outputs available on
each boiler. This menu allows assignment
of which inputs/outputs operate which
priority/system.
s See “SlimFit control Priorities & Input/
Outputs” on page 4 for an explanation of
priorities, inputs and outputs.
s Priority settings are adjustable. See page 53
through page 56 for priority options.
INPUT 1
INPUT 2
INPUT 3
s The Assign Inputs menu is for designating
priorities to the correct inputs according to
the system installed.
s Multiple inputs can use the same priority.
s The Source line designates Input 1 as either
thermostat controlled or 0–10V controlled.
(On Master/Shadow systems, this line is
not present and Input 1 is predetermined
as a thermostat-controlled input.)
s When choosing 0–10V as the Source, a
NOTICE screen will pop up explaining
the use of the 0–10V input. Press SAVE to
use this option, or press cancel to return
the input to TT1.
s The AUX PUMP/OUTPUT function enables an output to turn on in a variety of
selectable conditions.
AUX PUMP/
OUTPUT
s See page 58 for explanations and recommended applications.
s In network boiler applications, outputs
assigned AUX PUMP/OUTPUT are controlled by the master boiler, based on the
input/output and blower behaviors of all
boilers on the network.
Screens shown here are typical only.
Actual screens depend on control settings
chosen.
Part number 550-100-190/0917
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®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
AUX PUMP/OUTPUT options
Figure 35 AUX PUMP/ OUTPUT operation (accessed in ASSIGN INPUTS menu – see page 57)
Option
Activation conditions
Suggested uses
s Hot loop for seasonal boilers that are manually
shut down at end of season and started up at
start of heating season.
s Hot loop for boilers whose CH is manually
The output is energized on closure of an external switch wired to this
shut down at end of season and started up at
input and is de-energized when the external switch opens.
start of heating season, but remain available for
local calls (DHW, etc.).
This output is energized only when outdoor temperature is below the
WWSD setting (see BOILER SETTINGS menu, Figure 27, page 48).
s Hot loop for boilers whose CH is automatically shut down based on outdoor temperature
This setting is non-selectable if WWSD is set to OFF or ODT is not
(inferred heat loss), but remain on for local
connected at initial boiler power. If Outdoor Below WWSD is already
calls (DHW, etc.).
chosen and WWSD is later set to OFF, Outdoor Below WWSD will
behave as Always On.
The assigned output is energized if there is an input closure on any of
the network boilers.
The assigned output will de-energize once there are; no input closures
s Energize a system pump relay if pump must
on any of the network boilers, post-purge has finished, and post-pump
run during all heating calls.
time has expired.
If the closed input is configured for a heat demand, its output will deenergize after post-purge and post-pump.
The assigned output is energized:
ALWAYS ON
s Output is always energized whenever the control is powered.
EXTERNAL
SWITCH
s
s
OUTDOOR
BELOW WWSD
s
s
s
ANY TT I NPUT
s
s
ANY TT I NPUT
BY ITS PRIORITY
SETTINGS
ANY BURNER
DEMAND
s If there is an input closure on any of the network boilers.
AND . . .
s RUN AUX PUMP/OUTPUT is set to YES for the priority
assigned to the closed input.
s Energize a system pump relay if pump must
run only on some heat calls (such as systems
with locally-connected DHW heating).
s The assigned output will de-energize once there are; no input closures
on any of the network boilers, post-purge has finished, and post-pump
time has expired.
s The assigned output is energized when any boiler on the network
receives a call for heat and starts to pre-purge.
s Use for interlocking with combustion air
damper, flow switch, etc.
s The assigned output is de-energized once all burners are off and postpurge is complete.
Figure 36 AUX PUMP/ OUTPUT operation — start, run and stop, based on boiler status
Option
Standby
ANY TT I NPUT
OR
ANY TT I NPUT BY ITS
PRIORITY SETTINGS
off
ANY BURNER DEMAND
off
– 58 –
TT
PrePre-Pump
Closed
Purge
Burner
Running
PostPurge
PostPump
ON
off
off
ON
off
Standby
Comments
off
s See Figure 35 for explanation of
differences between the ANY TT
INPUT options.
off
Part number 550-100-190/0917
®
SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
MAINTENANCE, DATE AND TIME menus
Figure 37 MAINTENANCE, DATE AND TIME menus — navigation (see Figure 26, page 45 for access information)
Maintenance Info
Comments
Name
Contractor name to appear in maintenance reminders and during lockouts
Phone
Contractor phone number
Model
Displays the boiler model selected in the boiler setup
CP Number
Enter the CP# of the boiler
Installed
Enter the date the boiler was installed
Last Date
Date automatically entered when Reset Reminder is chosen by contractor
Next Date
Date automatically calculated when Reset Reminder is selected by contractor
Interval Settings
Contractor selects maintenance reminder frequency based on service history
Reset Reminder
Contractor selects this to update Last maintenance Date and Next Date. Homeowner uses this to ignore the reminder and update only the Next
Date.
Set Time and Date
Comments
Year
Set year (homeowner or contractor)
Month
Set month (homeowner or contractor)
Day
Set day (homeowner or contractor)
Hour
Set hour (homeowner or contractor)
Minute
Set minute (homeowner or contractor)
MAINTENANCE INFO
Use this section to enter contractor’s information, CP number, install date and to enter an automatic notice for maintenance (default is 12 months). Because this shows on the display, it is an automatic means of notifying the homeowner of need for scheduled
maintenance by the technician. Select RESET REMINDER to reset for the next maintenance date.
SET TIME AND DATE
Enter current date and time. This allows correct maintenance reminder timing and provides date and time stamp for lockout
histories on ERROR screen in Diagnostic Menu.
Gas Valve Test
Select gas valve 1 or gas valve 2 to alter the state of the corresponding gas valve relay during burner fire.
Part number 550-100-190/0917
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SlimFit Series 2 COMMERCIAL CONDENSING WATER BOILER — Advanced Manual
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