INSTALLATION INSTRUCTIONS R--410A Single Package Heat Pump

INSTALLATION INSTRUCTIONS R--410A Single Package Heat Pump
INSTALLATION INSTRUCTIONS
R--410A Single Package Heat Pump
RHS150
RHS150 units for installation in the United States contain use of the 2-speed indoor fan
control system. This complies with the U.S. Department of Energy (DOE) efficiency standard
of 2018.
RHS150 units for installation outside the United States may or may not contain use of the
2-speed indoor fan control system as they are not required to comply with the U.S.
Department of Energy (DOE) efficiency standard of 2018.
For specific details on operation of the 2-speed indoor fan system refer to the Variable
Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup
and Troubleshooting manual.
NOTE: Read the entire instruction manual before starting
the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
REFRIGERATION SYSTEM COMPONENTS . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 8
Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 2 - Plan for Sequence of Unit Installation . . . . . . 8
Curb-- Mounted Installation . . . . . . . . . . . . . . . . . . . 8
Pad-- Mounted Installation . . . . . . . . . . . . . . . . . . . . 8
Frame-- Mounted Installation . . . . . . . . . . . . . . . . . . 8
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 8
Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Slab Mount (Horizontal Units Only) . . . . . . . . . . 10
Alternate Unit Support
(In Lieu of Curb or Slab Mount) . . . . . . . . . . . . . 10
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . 10
For Units with Accessory Electric Heaters . . . . . 10
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . 10
Positioning on Curb . . . . . . . . . . . . . . . . . . . . . . . 10
Step 7 - Convert to Horizontal and Connect
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . 11
Economizer Hood Removal and Setup Factory Option . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Two Position Damper Hood Removal and Setup Factory Option . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Economizer Hood and Two-- Position Hood . . . . . 12
Step 9 - Install External Condensate Trap and Line . 13
Step 10 - Make Electrical Connections . . . . . . . . . . . 14
Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 14
All Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Units Without Factory-- Installed
Non-- Fused Disconnect . . . . . . . . . . . . . . . . . . . . . 18
Units with Factory-- Installed
Non-- Fused Disconnect . . . . . . . . . . . . . . . . . . . . . 18
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 18
Factory-- Option Thru-- Base Connections . . . . . . . 20
Units Without Thru-- Base Connections . . . . . . . . 20
Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 20
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Central Terminal Board . . . . . . . . . . . . . . . . . . . . . . 21
Commercial Defrost Control . . . . . . . . . . . . . . . . . . 21
Unit Without Thru-- Base Conversion Kit . . . . . . . 23
Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 23
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Single Point Boxes . . . . . . . . . . . . . . . . . . . . . . . . 24
Heater and Supplementary Fuses . . . . . . . . . . . . . 24
Heater Low-- Voltage Control Connections . . . . . . 24
2-- Speed Indoor Fan Motor System with Variable
Frequency Drive (Factory-- Installed Option) . . . . . . 24
EconoMi$erR X (Factory-- Installed Option) . . . . . . 25
Product Description . . . . . . . . . . . . . . . . . . . . . . . . 25
System Components . . . . . . . . . . . . . . . . . . . . . . . 25
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
W7220 Economizer Module . . . . . . . . . . . . . . . . . 25
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Specifications are subject to change without notice.
516 01 2801 03 1/2018
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Economizer Module Wiring Details . . . . . . . . . . .
S-- Bus Sensor Wiring . . . . . . . . . . . . . . . . . . . . . .
CO2 Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . .
Interface Overview . . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup and Configuration . . . . . . . . . . . . . . . . . . . . .
Time-- out and Screensaver . . . . . . . . . . . . . . . . . .
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . .
Enthalpy Settings . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two-- Speed Fan Operation . . . . . . . . . . . . . . . . . . . .
Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Menu Display . . . . . . . . . . . . . . . . . . . . . . .
Power Loss (Outage or Brownout) . . . . . . . . . . . .
Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checkout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearing Alarms . . . . . . . . . . . . . . . . . . . . . . . . . .
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 11 - Adjust Factory-- Installed Options . . . . . . . .
Step 12 - Install Accessories . . . . . . . . . . . . . . . . . . .
Step 13 - Check Belt Tension . . . . . . . . . . . . . . . . . . .
26
26
26
26
27
27
28
28
28
28
28
29
34
38
38
39
39
39
39
39
39
39
39
39
40
40
41
41
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety-- alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lock(s) and lockout tag(s). Ensure electrical service to
rooftop unit agrees with voltage and amperage listed
on the unit rating plate. Unit may have more than one
power switch.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
R-- 410A refrigerant systems operate at higher
pressures than standard R-- 22 systems. Do not use
R-- 22 service equipment or components on R-- 410A
refrigerant equipment.
UNIT START-- UP CHECKLIST . . . . . . . . . . . . . . . . . . 43
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal
injury or property damage. Consult a qualified installer,
service agency, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory-- authorized kits or accessories
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA 70,
National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
. When you see this symbol on the
safety-- alert symbol
unit and in instructions or manuals, be alert to the
potential for personal injury.
2
!
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
air conditioning equipment.
Specifications are subject to change without notice.
516 01 2801 03
Rated Indoor Airflow (cfm)
The table to the right lists the rated indoor airflow used
for the AHRI efficiency rating for the units covered in this
document.
Model Number
Full Load Airflow (cfm)
RHS150
4500
MODEL NUMBER NOMENCLATURE
MODEL SERIES
R
H
S
1
5
0
H
0
A
A
0
A
A
T
Position Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R = Rooftop
H = Heat Pump
Type
S = Standard Efficiency
Efficiency
150 = 150,000 = 12.5 tons
Nominal Cooling Capacity
H = 208/230--3--60
L = 460--3--60
S = 575--3--60
Voltage
0 = No Heat
Heating Capacity *
A = Standard Static Option -- Belt Drive
B = High Static Option -- Belt Drive
C = Medium Static Option -- Belt Drive
E = High Static Option -- High Efficiency Motor
Motor Options
A = None
B = Economizer w/ Barometric Relief, OA Temp Sensor
E = Economizer w/ Barometric Relief + CO2 Sensor, OA Temp Sensor
H = Economizer w/ Barometric Relief, Enthalpy Sensor
L = Economizer w/ Barometric Relief + CO2 Sensor, Enthalpy Sensor
P = 2--Position Damper w/ Barometric Relief
U = Ultra Low Leak Economizer w/ Barometric Relief, OA Temp Sensor
W = Ultra Low Leak Economizer w/ Barometric Relief, Enthalpy Sensor
Outdoor Air Options / Control
0A = No Options
Factory-- Installed Options*
A = Aluminum / Copper Condenser and Evaporator Coils
B = Pre--Coat Aluminum / Copper Condenser and Aluminum / Copper Evaporator Coils
C = E--Coat Aluminum / Copper Condenser and Aluminum / Copper Evaporator Coils
D = E--Coat Aluminum / Copper Condenser and E--Coat Aluminum / Copper Evaporator Coils
E = Copper / Copper Condenser and Aluminum / Copper Evaporator Coils
F = Copper / Copper Condenser and Copper / Copper Evaporator Coils
T = 2--Speed Indoor Motor Controller (VFD) -- Standard on U.S. models
A = Standard Single Speed Indoor Fan Motor. For W7212 controls
B = Standard Single Speed Indoor Fan Motor. For W7220 controls
Condenser / Evaporator Coil Configuration
Indoor Fan Motor Speed
* See RHS 6 to 12.5 ton Product Specification for details.
516 01 2801 03
Specifications are subject to change without notice.
3
Fig. 1 - RHS150 Unit Dimensional Drawing
4
Specifications are subject to change without notice.
516 01 2801 03
Fig. 1 - RHS150 Unit Dimensional Drawing (cont)
516 01 2801 03
Specifications are subject to change without notice.
5
D
C
B
A
C09897B
LOCATION
DIMENSION
CONDITION
A
48--- in (1219 mm)
18--- in (457 mm)
18--- in (457 mm)
12--- in (305 mm)
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
B
42--- in (1067 mm)
36--- in (914 mm)
Special
Surface behind servicer is grounded (e.g., metal, masonry wall)
Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
Check sources of flue products within 10--- ft of unit fresh air intake hood
C
36--- in (914 mm)
18--- in (457 mm)
Side condensate drain is used
Minimum clearance
D
42--- in (1067 mm)
36--- in (914 mm)
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application
planning overhead obstruction or for vertical clearances.
Fig. 2 - Service Clearance Dimensional Drawing
REFRIGERATION SYSTEM
COMPONENTS
Each heat pump refrigeration system includes a
compressor, accumulator, reversing valve, dual-- function
outdoor coil with vapor header check valve, cooling liquid
line with a filter drier and a check valve, dual-- function
indoor coil with a vapor header check valve, and heating
liquid line with a check valve and a strainer. RHS150
units have two compressor-- circuits. See Fig. 3 for typical
unit piping schematic (4-- row indoor coil with two
compressor-- circuits is shown).
Dual-- function outdoor and indoor coils are designed to
provide parallel coil circuits during evaporator-- function
operation and converging coil circuits during the
condenser-- function operation.
Reversing Valve and Check Valve Position
See Fig. 3 (on page 7) and Tables 1, 2, and 3.
Refrigerant System Pressure Access Ports
There are two access ports on the suction tube and the
discharge tube near the compressor. These are brass fittings
with black plastic caps. The hose connection fittings are
standard 1/4- in. SAE male flare couplings.
The brass fittings are two-- piece High Flow valves, with a
receptacle base brazed to the tubing and an integral
spring-- closed check valve core screwed into the base. See
Fig. 4 on page 7. This check valve is permanently
assembled into this core body and cannot be serviced
separately. Replace the entire core body if necessary. Service
tools are available from Replacement Components that
allow the replacement of the check valve core without
having to recover the entire system refrigerant charge. Apply
compressor refrigerant oil to the check valve core’s bottom
O--ring. Install the fitting body and torque to 96 10 in--lbs
(10.9  1 Nm). Do not exceed 106 in--lbs (11.9 Nm) when
tightening.
Table 1 – Cooling Mode (each circuit)
Troubleshooting Refrigerant Pressure Problems and
Check Valves
Component
Status/Position
Reversing Valve
Energized
Refer to Fig. 3 and the Cooling Mode and Heating Mode
tables (Tables 1 and 2).
Check Valve A
Closed
Check Valve B
Open
Check Valve C
Closed
Check Valve D
Open
6
Specifications are subject to change without notice.
516 01 2801 03
Table 2 – Heating Mode (each circuit)
Component
Status/Position
Reversing Valve
De--- energized
Check Valve A
Open
Check Valve B
Closed
Check Valve C
Open
Check Valve D
Closed
Table 3 – Defrost Mode
Component
Status/Position
Defrost Thermostat
Closed
Outdoor Fan(s)
Off
Reversing Valve
Energized
Check Valve A
Closed
Check Valve B
Open
Check Valve C
Closed
Check Valve D
Open
LPS/LOC
Filter
Drier
2B
Cooling Liquid Lines
1B
Acutrol
DFT 1
Acutrol
1A
2D
DFT 2
COMPRESSOR
ACCUMULATOR
Reversing
Valve
HPS
Comp 2
1D
Reversing
Valve
COMPRESSOR
ACCUMULATOR
2A
Outdoor Coil
Heating Mode Liquid Lines
HPS
Indoor Coil
Comp 1
2C
1C
Strainer
Fig. 3 - Typical Unit Piping Schematic (with TXV valves on Indoor Coils)
SEAT
C160139
CORE
(Part No. EC39EZ067)
1/2-20 UNF RH
0.596
45°
30°
5/8” HEX
WASHER
O-RING
0.47
1/2” HEX
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
Fig. 4 - CoreMax* Access Port Assembly
DEPRESSOR PER AHRI 720
+.01/-.035
FROM FACE OF BODY
7/16-20 UNF RH
a548J--- 009
*CoreMax is a registered trademark of FasTest Inc.
516 01 2801 03
Specifications are subject to change without notice.
7
INSTALLATION
Review the following for recommended sequences for
installation steps.
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installation requirements.
2. Determine unit location (from project plans) or select
unit location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb
or other) that provides for at least the minimum clearances
required for safety. This includes the clearance to
combustible surfaces, unit performance and service access
below, around and above unit as specified in unit
drawings. See Fig. 2.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof--covering material when roof curb is used.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents , relief valves, or other sources of
contaminated air.
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto
the unit.
Select a unit mounting system that provides adequate
height to allow for removal and disposal of frost and ice
that will form during the heating-- defrost mode as well as
allow installation of condensate trap per requirements.
Refer to Step 9 — Install External Condensate Trap and
Line – for required trap dimensions.
Roof Mount —
Check building codes for weight distribution
requirements. Unit operating weight is shown in Table 4.
Table 4 – Operating Weights
RHS150
Base Unit
UNITS LB (KG)
1370 (620)
Economizer
Vertical
100 (45)
Horizontal
115 (52)
Powered Outlet
32 (15)
Curb
Curb-- Mounted Installation —
Install curb
Install field-- fabricated ductwork inside curb
Install accessory thru-- base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details)
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 9 for
details)
Rig and place unit
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Pad-- Mounted Installation —
Prepare pad and unit supports
Check and tighten the bottom condensate drain
connection plug
Rig and place unit
Convert unit to side duct connection arrangement
Install field-- fabricated ductwork at unit duct openings
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Frame-- Mounted Installation —
Frame-- mounted applications generally follow the
sequence for a curb installation. Adapt as required to
suit specific installation plan.
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim
with transportation agency.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data
plate agree with power supply provided.
Step 4 — Provide Unit Support
Roof Curb Mount —
Accessory roof curb details and dimensions are shown in
Fig. 5. Assemble and install accessory roof curb in
accordance with instructions shipped with the curb.
Step 2 — Plan for Sequence of Unit Installation
NOTE: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with
the roof curb as shown in Fig. 5. Improperly applied
gasket can also result in air leaks and poor unit
performance.
The support method used for this unit will dictate different
sequences for the steps of unit installation. For example,
on curb-- mounted units, some accessories must be
installed on the unit before the unit is placed on the curb.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in
Fig. 6. Refer to Accessory Roof Curb Installation
Instructions for additional information as required.
8
14--- in/356 mm
180 (82)
24--- in/610 mm
235 (107)
Specifications are subject to change without notice.
516 01 2801 03
Fig. 5 - Roof Curb Details
516 01 2801 03
Specifications are subject to change without notice.
a548J--- 013
9
!
MAXIMUM ALLOWABLE
DIFFERENCE IN. (MM)
A-B
0.5″ (13)
B-C
1.0″ (25)
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in damage
to roofing materials.
Membrane roofs can be cut by sharp sheet metal
edges. Be careful when placing any sheet metal parts
on such roof.
A-C
1.0″ (25)
Fig. 6 - Unit Leveling Tolerances
a50--- 9658
Step 6 — Rig and Place Unit
Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb and
not to the unit.
When the unit is ready to be rigged and no longer will be
lifted by a fork truck, the wood protector under the basepan
must be removed. Remove 4 screws from each base rail.
Wood protector will drop to the ground. See instructions on
the unit base rails.
If electric and control wiring is to be routed through the
basepan, attach the accessory thru-- the-- base service
connections to the basepan in accordance with the
accessory installation instructions.
Keep unit upright and do not drop. Spreader bars are
required. Rollers may be used to move unit across a roof.
Level by using unit frame as a reference. See Table 4 and
Fig. 8 for additional information.
Slab Mount (Horizontal Units Only) —
Lifting holes are provided in base rails as shown in Fig. 8.
Refer to rigging instructions on unit.
Provide a level concrete slab that extends a minimum of
6 in. (150 mm) beyond unit cabinet. Install a gravel apron
in front of condenser coil air inlet to prevent grass and
foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb
if required.
Alternate Unit Support (In Lieu of Curb or Slab
Mount) —
A non--combustible sleeper rail can be used in the unit curb
support area. If sleeper rails cannot be used, support the long
sides of the unit with a minimum of 3 equally spaced 4--in. x
4--in. (102 mm x 102 mm) pads on each side.
Step 5 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition)
shall not exceed 0.35 in. wg (87 Pa) with economizer or
0.45 in. wg (112 Pa) without economizer.
For vertical ducted applications, secure all ducts to roof curb
and building structure. Do not connect ductwork to unit.
Insulate and weatherproof all external ductwork, joints,
and roof openings with counter flashing and mastic in
accordance with applicable codes.
Ducts passing through unconditioned spaces must be
insulated and covered with a vapor barrier.
Rigging materials under unit (cardboard or wood) must be
removed PRIOR to placing the unit on the roof curb.
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck.
Before setting the unit onto the curb, recheck gasketing on
curb.
Positioning on Curb —
For full perimeter curbs CRRFCURB072A00 and 073A00,
the clearance between the roof curb and the front and rear
base rails should be 1/4 in. (6.4 mm). The clearance between
the curb and the end base rails should be 1/2 in. (13 mm).
For retrofit applications with curbs CRRFCURB003A01 and
4A01, the unit should be position as shown in Fig. 7.
Maintain the 15 1/2 in. (394 mm) and 8 5/8 in. (220 mm)
clearances and allow the 22 5/16 in. (567 mm) dimension to
float if necessary.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with
applicable fire codes.
For Units with Accessory Electric Heaters —
All installations require a minimum clearance to
combustible surfaces of 1-- in. (25 mm) from duct for first
12-- in. (305 mm) away from unit.
10
Fig. 7 - Retrofit Installation Dimensions
Specifications are subject to change without notice.
C10003
516 01 2801 03
PLACE ALL GASKET IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
914 - 1371
( 36” - 54” )
“B”
“C”
DETAIL “A”
“A”
DUCT END
SEE DETAIL “A”
C10281
UNIT
RHS150
NOTES:
DIMENSIONS
MAX WEIGHT
A
B
C
LB
KG
IN
MM
IN
MM
IN
MM
2015
916
116.0
2945
55.5
1410
59.5
1510
1. Dimensions in ( ) are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the
unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.
Fig. 8 - Rigging Details
If the alternative condensate drain location through the
bottom of the unit is used in conjunction with a retrofit curb,
the hole in the curb must be moved 121/2 in. (320 mm)
towards the end of the unit.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Remove all shipping materials and top skid. Remove extra
center post from the condenser end of the unit so that the
condenser end of the unit matches Fig. 18 - 20. Recycle
or dispose of all shipping materials.
Step 7 — Convert to Horizontal and Connect
Ductwork (when required)
Unit is shipped in the vertical duct configuration. Unit
without factory--installed economizer or return air smoke
detector option may be field--converted to horizontal ducted
configuration using accessory CRDUCTCV001A00. To
convert to horizontal configuration, remove screws from side
duct opening covers and remove covers.
Discard the supply duct cover. Install accessory
CRDUCTCV001A00 to cover the vertical supply duct
opening. Use the return duct cover removed from the end
panel to cover the vertical return duct opening.
Field-- supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
flanges. Insulate and weatherproof all external ductwork,
joints, and roof or building openings with counter flashing
and mastic in accordance with applicable codes.
Do not cover or obscure visibility to the unit’s informative
data plate when insulating horizontal ductwork.
516 01 2801 03
Fig. 9 - Horizontal Conversion Panels
C06108
Step 8 — Install Outside Air Hood
Economizer Hood Removal and Setup Factory Option —
1. The hood is shipped in knock-- down form and located
in the return air compartment. It is attached to the
economizer using two plastic tie-- wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 10.)
3. Locate and cut the (2) plastic tie-- wraps, being careful
to not damage any wiring. (See Fig. 11.)
4. Carefully lift the hood assembly through the filter
access opening and assemble per the steps outlined in
Economizer Hood and Two–Position Hood on page 12.
Specifications are subject to change without notice.
11
Two Position Damper Hood Removal and Setup Factory Option —
FILTER ACCESS PANEL
INDOOR COIL ACCESS PANEL
Fig. 10 - Typical Access Panel Locations
C10004
Remove Hood Parts
1. The hood is shipped in knock-- down form and
assembled to a metal support tray using plastic stretch
wrap. Located in the return air compartment, the
assembly’s metal tray is attached to the basepan and
also attached to the damper using two plastic
tie-- wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 10.)
3. Locate the (2) screws holding the metal tray to the
basepan and remove. In order to remove the screws, it
may be necessary to remove the panel underneath the
two-- position damper. Remove the two screws. Locate
and cut the (2) plastic tie-- wraps securing the
assembly to the damper. (See Fig. 12.) Be careful to
not damage any wiring or cut tie-- wraps securing any
wiring.
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per the
steps outlined in Economizer Hood and Two–Position
Hood.
5. If removed, reattach the panel under the damper.
Economizer Hood and Two-- Position Hood —
NOTE: If the power exhaust accessory is to be installed
on the unit, the hood shipped with the unit will not be
used and must be discarded. Save the aluminum filter for
use in the power exhaust hood assembly.
1. The indoor coil access panel will be used as the top of
the hood. If the panel is still attached to the unit, remove the screws along the sides and bottom of the
panel. See Fig. 13.
Cut Plastic Ties
(2) Places
Economizer
SIDE
PANEL
Fig. 11 - Economizer Wiring
C10005
RAIN DEFLECTORS
TOP
PANEL
Hood Parts
CAULK
HERE
INDOOR
COIL
ACCESS
PANEL
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
Fig. 12 - Damper Assembly
12
C10006
INDOOR
COIL
ACCESS
PANEL
C10007
Fig. 13 - Indoor Coil Access Panel Relocation
2. Swing out indoor coil access panel and insert the
hood sides under the panel (hood top). Be careful not
to lift the panel too far as it might fall out. Use the
screws provided to attach the hood sides to the hood
top. Use screws provided to attach the hood sides to
the unit. See Fig. 14.
Specifications are subject to change without notice.
516 01 2801 03
Step 9 — Install External Condensate Trap and
Line
TOP
PANEL
INDOOR COIL
ACCESS PANEL
The unit has one 3/4-in. condensate drain connection on
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 16. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal
applications.
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do
this before setting the unit in place. The red drain pan can
be tightened with a 1/2 - in. square socket drive extension.
SCREW
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a 1/2 - in.
square socket drive extension) and install it in the side
drain connection.
LEFT
HOOD
SIDE
HOOD DIVIDER
Fig. 14 - Economizer Hood Construction
C10008
3. Remove the shipping tape holding the economizer
barometric relief damper in place.
4. Insert the hood divider between the hood sides. See
Fig. 14 and 15. Secure hood divider with 3 screws on
each hood side. The hood divider is also used as the
bottom filter rack for the aluminum filter.
5. Attach the post that separates the filters with the
screws provided.
6. Open the filter clips which are located underneath the
hood top. Insert the aluminum filters into the bottom
filter rack (hood divider). Push the filter into position
past the open filter clips. Close the filter clips to lock
the filters into place. See Fig. 15.
CONDENSATE PAN (SIDE VIEW)
STANDARD
DRAIN PLUG
SIDE DRAIN
(FACTORY-INSTALLED)
ALTERNATE
BOTTOM DRAIN
Fig. 16 - Condensate Drain Pan (Side View)
C08021
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 17.
MINIMUM PITCH
1” (25mm) PER
10’ (3m) OF LINE
BASE RAIL
OPEN
VENT
3˝(76mm)
MIN
DIVIDER
TO ROOF
DRAIN
OUTSIDE
AIR
SEE NOTE
HOOD
ROOF
CURB
CLEANABLE
ALUMINUM
FILTER
BAROMETRIC
RELIEF
DRAIN PLUG
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4 in. (102 mm) trap is recommended.
FILTER
FILTER
CLIP
Fig. 15 - Economizer Filter Installation
C10009
7. Install the two rain deflectors on the edge of the hood
top as shown in Fig. 13.
8. Caulk the ends of the joint between the unit top panel
and the hood top as shown in Fig. 13.
9. Replace the filter access panel.
516 01 2801 03
a50--- 9660
Fig. 17 - Condensate Drain Piping Details
All units must have an external trap for condensate
drainage. Install a trap at least 4-in. (102 mm) deep and
protect against freeze-up. If drain line is installed
downstream from the external trap, pitch the line away
from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do
not use a pipe size smaller than the unit connection
( 3/4 -in.).
Specifications are subject to change without notice.
13
Step 10 — Make Electrical Connections
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground. Unit
cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of
personal injury if an electrical fault should occur. This
ground may consist of electrical wire connected to
unit ground lug in control compartment, or conduit
approved for electrical ground when installed in
accordance with NEC (National Electrical Code);
ANSI/NFPA 70, latest edition (in Canada, Canadian
Electrical
Code
CSA
[Canadian
Standards
Association] C22.1), and local electrical codes.
Fig. 19 - Conduit into Control Box
C10011
NOTE: Check all factory and field electrical connections
for tightness. Field-- supplied wiring shall conform with
the limitations of 63_F (33_C) rise.
Field Power Supply —
For those units without through--the--curb power, conduit
must be used to route the main power from the condenser
end of the unit to either the factory option disconnect, the
bottom of the control box or the single point box accessory.
1 inch conduit is provided behind the access panel located
under the control box. For those units that require conduit
larger than 1 inch, it must be field supplied. Figures 18-- 20
show the various wire routings.
Fig. 20 - Conduit into Single Point Box
C10012
If the field disconnect is larger than 100A, it must be
attached to the unit using accessory CRDISBKT001A00
(see Fig. 21). Follow the instructions provided with this
accessory. For smaller field disconnects, be sure to use 1/2 in.
screws to mount the disconnect directly to the end panel
(see Fig. 22). In either case, set the disconnect vertical
location on the unit so that a 90 degree fitting can be used
to connect the conduit to the disconnect.
C10014
Fig. 21 - Mounting Position for Field Disconnects
(over 100A)
C10010
Fig. 18 - Conduit into Factory Option Disconnect
14
Specifications are subject to change without notice.
516 01 2801 03
Units Without Disconnect Option
TB1
11
13
13
Disconnect
per
NEC
L1
L2
L3
208/230-3-60
460-3-60
575-3-60
Units With Disconnect Option
C10013
Fig. 22 - Mounting Position for Field Disconnects
(up to 100A)
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is
to be connected to a 208-v power supply, the control
transformer must be rewired by moving the black wire
with the 1/4 -in. female spade connector from the 230-- v
connection and moving it to the 200-v 1/4 -in. male
terminal on the primary side of the transformer. Refer to
unit label diagram for additional information.
Field power wires are connected to the unit at line-- side
pressure lugs at the main terminal block (TB1) or at
factory-- installed option non-- fused disconnect switch.
Max wire size is #2 AWG (copper only). (See Fig. 24.)
NOTE: TEST LEADS - Unit may be equipped with
short leads (pigtails) on the field line connection points off
the optional disconnect switch. These leads are for factory
run-- test purposes only; remove and discard before
connecting field power wires to unit connection points.
Make field power connections directly to line connection
pressure lugs only.
!
WARNING
L1
2
L2
4
L3
6
ELECTRIC
DISCONNECT
SWITCH
3
Factory
Wiring
5
Disconnect factory test leads; discard.
Fig. 24 - Power Wiring Connections
C10015
All Units All field wiring must comply with the NEC and local
requirements.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 24 and the unit label
diagram for power wiring connections to the unit power
terminal blocks and equipment ground. Maximum wire
size is #2/0 AWG per pole.
Provide a ground-- fault and short-- circuit over-- current
protection device (fuse or breaker) per NEC Article 440
(or local codes). Refer to unit informative data plate for
MOCP (Maximum Over-- current Protection) device size.
FIRE HAZARD
Failure to follow this warning could result in
intermittent operation or performance satisfaction.
Do not connect aluminum wire between disconnect
switch and furnace. Use only copper wire.
(See Fig. 23.)
1
Optional
Disconnect
Switch
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate
any applicable warranty.
COPPER
WIRE ONLY
ALUMINUM
WIRE
Fig. 23 - Disconnect Switch and Unit
516 01 2801 03
A93033
Specifications are subject to change without notice.
15
Fig. 25 - Typical RHS150 Control Wiring Diagram
16
Specifications are subject to change without notice.
a50--- 9707
516 01 2801 03
Fig. 26 - Typical RHS150 Power Wiring Diagram (208/230V 3 Phase 60Hz unit shown)
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. On
3-- phase units, voltages between phases must be balanced
within 2% and the current within 10%. Use the formula
below to determine the percent of voltage imbalance.
% Voltage
Imbalance
= 100 x
max voltage deviation from average voltage
% Voltage Imbalance
= 100 x
4
227
= 1.76%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
AB = 224 v
BC = 231 v
AC = 226 v
516 01 2801 03
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
average voltage
Example: Supply voltage is 230-3-60
Average Voltage =
a50--- 9708
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
(224 + 231 + 226)
3
=
681
3
=
227
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate
any applicable warranty.
Specifications are subject to change without notice.
17
Units Without Factory-- Installed
Non-- Fused Disconnect —
When installing units, provide a disconnect switch of
adequate size per NEC (National Electrical Code).
Disconnect sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per
national or local codes. Do not cover unit informative
plate if mounting the disconnect on the unit cabinet.
9. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
10. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
11. Engaging the shaft into the handle socket, re-- install
(3) hex screws on the NFD enclosure.
12. Re-- install the unit front panel.
Units with Factory-- Installed Non-- Fused Disconnect —
The factory-- installed option disconnect switch is located
in a weatherproof enclosure located under the main
control box. The manual switch handle is accessible
through an opening in the access panel. Discard the
factory test leads (see Fig. 24). The factory disconnect is
an 80A disconnect.
C12325
Fig. 28 - Handle and Shaft Assembly for NFD
Convenience Outlets —
!
C12324
Fig. 27 - Location of Non-- Fused Disconnect Enclosure
To field install the NFD shaft and handle:
1. Remove the unit front panel (see Fig. 1).
2. Remove (3) hex screws on the NFD enclosure - (2) on
the face of the cover and (1) on the bottom.
3. Remove the front cover of the NFD enclosure.
4. Make sure the NFD shipped from the factory is at
OFF position (the arrow on the black handle knob is
at OFF).
5. Insert the shaft with the cross pin on the top of the shaft
in the horizontal position.
6. Measure the tip of the shaft to the top surface of the
pointer to be 3.75 to 3.88 in. (95 to 99 mm) for 80A
and 100A NFD and 3.43 to 3.56 in. (87 to 90 mm) for
200A NFD.
7. Tighten the locking screw to secure the shaft to the
NFD.
8. Turn the handle to the OFF position with red arrow
pointing at OFF.
18
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits may use
multiple disconnects. Check convenience outlet for
power status before opening unit for service. Locate
its disconnect switch, if appropriate, and open it.
Tag-- out this switch, if necessary.
Two types of convenience outlets are offered as
factory-- installed options on RHS150 units: Non-- powered
and unit-- powered. Both types provide a 125-- volt GFCI
(ground-- fault circuit-- interrupter) duplex receptacle rated
at 15-- A behind a hinged waterproof access cover, located
on the end panel of the unit. See Fig. 29.
A 20 amp non-- powered convenience outlet is available as
a field-- installed accessory.
Non--powered type: This type requires the field installation
of a general--purpose 125--volt 15--A circuit powered from a
source elsewhere in the building. Observe national and local
codes when selecting wire size and conduit requirements,
fuse or breaker requirements and disconnect switch size and
location. Route 125--v power supply conductors into the
bottom of the utility box containing the duplex receptacle.
Specifications are subject to change without notice.
516 01 2801 03
Duty Cycle: the unit-- powered convenience outlet has a
duty cycle limitation. The transformer is intended to
provide power on an intermittent basis for service tools,
lamps, etc; it is not intended to provide 15-- amps loading
for continuous duty loads (such as electric heaters for
overnight use). Observe a 50% limit on circuit loading
above 8-- amps (i.e., limit loads exceeding 8-- amps to 30
minutes of operation every hour).
Pwd-CO
Fuse
Switch
Convenience
Outlet
GFCI
Test the GFCI receptacle by pressing the TEST button on
the face of the receptacle to trip and open the receptacle.
Check for proper grounding wires and power line phasing
if the GFCI receptacle does not trip as required. Press the
RESET button to clear the tripped condition.
Pwd-CO
Transformer
Disconnect
Access Panel
Fig. 29 - Convenience Outlet Location
C10361
Unit-- powered type: A unit-- mounted transformer is
factory-- installed to stepdown the main power supply
voltage to the unit to 115-- v at the duplex receptacle. This
option also includes a manual switch with fuse, located in
a utility box and mounted on a bracket behind the
convenience outlet; access is through the panel beneath
the control box. See Fig. 29.
The primary leads to the convenience outlet transformer
are not factory-- connected. Selection of primary power
source is a customer-- option. If local codes permit, the
transformer primary leads can be connected at the
line-- side terminals on the unit-- mounted non-- fused
disconnect switch; this will provide service power to the
unit when the unit disconnect switch is open. Other
connection methods will result in the convenience outlet
circuit being de-- energized when the unit disconnect
switch is open. See Fig. 30. On a unit without a
unit-- mounted disconnect, connect the source leads to the
main terminal block (TB1).
If the convenience outlet transformer is connected to the
line side of a field disconnect, the conduit provided with
the unit must be used to protect the wires as they are
routed from the transformer to the field disconnect. The
end of the conduit with the straight connector attaches to
the field disconnect. The other end does not need to
connect to the transformer; however, the conduit must be
routed so that all wiring is either in the conduit or behind
the access panel.
If the convenience outlet transformer is connected to the
line side of the factory disconnect option, route the wires
through the web bushing located on the bottom of the
disconnect box. For the load side wiring to the factory
option disconnect, route the wires through the hole on the
right side of the disconnect. Be sure to create a drip loop
at least 6 inches long.
516 01 2801 03
C08283
UNIT
VOLTAGE
CONNECT
AS
PRIMARY
CONNECTIONS
TRANSFORMER
TERMINALS
208,
230
240
L1: RED +YEL
L2: BLU + GRA
H1 + H3
H2 + H4
460
480
L1: RED
Splice BLU + YEL
L2: GRA
H1
H2 + H3
H4
575
600
L1: RED
L2: GRA
H1
H2
Fig. 30 - Unit Powered Convenience Outlet Wiring
Fuse on power type: The factory fuse is a Bussman
“Fusetron” T-- 15, non-- renewable screw-- in (Edison base)
type plug fuse.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Using unit-- mounted convenience outlets: Units with
unit-- mounded convenience outlet circuits will often
require that two disconnects be opened to de-- energize
all power to the unit. Treat all units as electrically
energized until the convenience outlet power is also
checked and de-- energization is confirmed. Observe
National Electrical Code Article 210, Branch Circuits,
for use of convenience outlets.
Specifications are subject to change without notice.
19
Installing Weatherproof Cover: A weatherproof
while-in-use cover for the factory-installed convenience
outlets is now required by UL standards. This cover
cannot be factory-mounted due its depth; it must be
installed at unit installation. For shipment, the
convenience outlet is covered with a blank cover plate.
voltage wires through appropriate conduits. Connect the
power conduit to the internal disconnect (if unit is so
equipped) or to the external disconnect (through unit side
panel). Remove one of the two knockouts located on the
bottom left side of the unit control box. Use this hole for
the control conduit.
The weatherproof cover kit is shipped in the unit’s control
box. The kit includes the hinged cover, a backing plate
and gasket.
DISCONNECT ALL POWER
CONVENIENCE OUTLET.
TO
UNIT
AND
LOW VOLTAGE
CONDUIT
CONNECTOR
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
HIGH VOLTAGE
CONDUIT
CONNECTOR
Loosen the two screws at the GFCI duplex outlet, until
approximately 1/2-in. (13 mm) under screw heads are
exposed. Press the gasket over the screw heads. Slip the
backing plate over the screw heads at the keyhole slots
and align with the gasket; tighten the two screws until
snug (do not over-tighten).
Mount the weatherproof cover to the backing plate as
shown in Fig. 31. Remove two slot fillers in the bottom of
the cover to permit service tool cords to exit the cover.
Check for full closing and latching.
COVER – WHILE-IN-USE
WEATHERPROOF
RECEPTACLE
NOT INCLUDED
Fig. 32 - Thru-- Base Connection Fittings
C10017
Units Without Thru-- Base Connections —
1. Install power wiring conduit through side panel openings. Install conduit between disconnect and control
box.
2. Install power lines to terminal connections as shown
in Fig. 24.
Field Control Wiring —
The RHS150 unit requires an external temperature control
device. This device can be a thermostat emulation device
provided as part of a third--party Building Management
System or the RTU Open controller (RTU Open controller is
available as a factory--installed option only).
Thermostat —
BASE PLATE FOR
GFCI RECEPTACLE
Fig. 31 - Weatherproof Cover Installation
C09022
Factory-- Option Thru-- Base Connections —
This service connection kit consists of a 1/2 - in. electrical
bulkhead connector and a 1 1/2 - in. electrical bulkhead
connector, all factory-- installed to the basepan cover plate.
Remove the cover plate from the shipping bracket and
attach to basepan with 8 screws provided. The 1/2 - in.
bulkhead connector enables the low-- voltage control wires
to pass through the basepan. The 1 1/2 - in. electrical
bulkhead connector allows the high-- voltage power wires
to pass through the basepan. See Fig. 32.
Install an approved accessory commerical 2 stage
Cooling/Heating thermostat according to installation
instructions included with the accessory. RHS150 models
do not require a thermostat with an O function to control
the reversing valve operation. If using an electronic
thermostat, configure it for “non-- heat pump” operation.
Locate the thermostat accessory on a solid wall in the
conditioned space to sense average temperature in
accordance with the thermostat installation instructions.
Check tightness of connector lock nuts before connecting
electrical conduits.
If the thermostat contains a logic circuit requiring 24-- v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of seven leads. If the
thermostat does not require a 24-- v source (no “C”
connection required), use a thermostat cable or equivalent
with minimum of six leads. Check the thermostat
installation instructions for additional features which
might require additional conductors in the cable.
Field-- supplied and field-- installed liquidtight conduit
connectors and conduit may be attached to the connectors
on the basepan. Pull correctly rated high voltage and low
For wire runs up to 50 ft. (15 m), use no. 18 AWG
(American Wire Gage) insulated wire [35_C (95_F)
minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWG
20
Specifications are subject to change without notice.
516 01 2801 03
insulated wire [35_C (95_F) minimum]. For over 75 ft.
(23 m), use no. 14 AWG insulated wire [35_C (95_F)
minimum]. All wire sizes larger than no. 18 AWG cannot
be directly connected to the thermostat and will require a
junction box and splice at the thermostat.
Typical
Thermostat
Connections
Central
Terminal
Board
X
C
C
G
G
W2
W2
(Note 2)
W1
W1
O/B/Y2
Y2
(Note 1)
Y1
Y1
R
R
T
H
E
R
M
O
S
T
A
T
DIP
Switches
Speed-Up
Jumpers
C09275
Fig. 34 - Defrost Control Board Arrangement
Note 1: Typical multi-function marking. Follow manufacturer’s configuration
instructions to select Y2. Do not configure for O output.
Note 2: W2 connection not required on units without electric heating.
Field Wiring
C09012
Fig. 33 - Typical Low-- Voltage Control Connections
Central Terminal Board
The Central Terminal Board (CTB) is a pass through
connection point. The CTB provides the capability to add
factory-- installed options and field-- installed accessories to
the units by cutting jumper wires without having to
change or reroute wires through the structure of the unit.
The CTB does not provide any microprocessor control; it
is simply a basic multifunction wiring terminal
configuration.
Commercial Defrost Control
The Commercial Defrost Control Board (DFB)
coordinates thermostat demands for supply fan control, 1
or 2 stage cooling, 2 stage heating, emergency heating and
defrost control with unit operating sequences. The DFB
also provides an indoor fan off delay feature (user
selectable). See Fig. 34 for board arrangement.
The DFB is located in the RHS150 unit’s main control box
(see Fig. 35 on page 22). All connections are factory--made
through harnesses to the unit’s CTB, to IFC (belt--drive
motor) or to ECM (direct--drive motor), reversing valve
solenoids and to defrost thermostats. Refer to Table 5 for
details of DFB Inputs and Outputs.
516 01 2801 03
Reversing valve control — The DFB has two outputs for
unit reversing valve control. Operation of the reversing
valves is based on internal logic; this application does not
use an “O” or “B” signal to determine reversing valve
position. Reversing valves are energized during the
cooling stages and the defrost cycle and de-- energized
during heating cycles. Once energized at the start of a
cooling stage, the reversing valve will remain energized
until the next heating cycle demand is received. Once
de-- energized at the start of a Heating cycle, the reversing
valves will remain de-- energized until the next cooling
stage is initiated.
Compressor control — The DFB receives inputs indicating
Stage 1 Cooling, Stage 2 Cooling and Stage 1 Heating from
the space thermostat or unit control system (RTU Open
controller); it generates commands to start compressors with
or without reversing valve operation to produce Stage 1
Cooling (one compressor runs), Stage 2 Cooling (both
compressors run) or Stage 1 Heating (both compressors run).
Auxiliary (Electric) Heat control — The RHS150 unit can
be equipped with one or two auxiliary electric heaters to
provide a second stage of heating. The DFB will energize
this Heating System for a Stage 2 Heating Command
(heaters operate concurrently with compressor(s) in the Stage
1 Heating cycle), for an Emergency Heating sequence
(compressors are off and only the electric heaters are
energized) and also during the Defrost cycle (to eliminate a
“cold blow” condition in the space).
Defrost — The defrost control mode is a time/temperature
sequence. There are two time components: The
continuous run period and the test/defrost cycle period.
The temperature component is provided by Defrost
Thermostat 1 and 2 (DFT1 and DFT2) mounted on the
outdoor coil.
Specifications are subject to change without notice.
21
Table 5 – RHS150 Defrost Board I/O and Jumper Configurations
Inputs
Point Name
Type of I/O
Connection Pin Number
Unit Connection
G Fan
DI, 24Vac
P2--- 3
CTB--- G
Y1 Cool 1
DI, 24Vac
P2--- 5
CTB--- Y1
Y2 Cool 2
DI, 24Vac
P2--- 4
CTB--- Y2
W1 Heat 1
DI, 24Vac
P2--- 7
CTB--- W1
W2 Heat 2
DI, 24Vac
P2--- 6
CTB--- W2
24Vac
P3--- 1
CONTL BRD--- 8
R Power
C Common
Note
24Vac
P3--- 2
CONTL BRD--- 4
DFT1
DI, 24Vac
DFT--- 1 to DFT--- 1
—
DFT 2
DI, 24Vac
DFT--- 2 to DFT--- 2
—
Point Name
Type of I/O
Connection Pin Number
Unit Connection
IFO Fan On
DO, 24Vac
P3--- 9
REHEAT/HP--- 2
OF OD Fan On
DO, 24Vac
OF
OFR
RVS1
DO, 24Vac
P3--- 7 to P3--- 5
—
Energize in COOL
RVS2
DO, 24Vac
P3--- 6 to P3--- 4
—
Energize in COOL
COMP 1
DO, 24Vac
P3--- 10
FPT1 --- REHEAT/HP--- 6
COMP 2
DO, 24Vac
P3--- 8
FPT2 --- REHEAT/HP--- 8
HEAT 2
DO, 24Vac
E--- HEAT
TB4--- 1
24Vac
P3--- 3
TB4--- 3
Outputs
COM
Note
Configuration
Point Name
Type of I/O
Connection Pin Number
Unit Connection
Select Jumper
24Vac
P1--- 1
—
2 Compressor
24Vac
P1--- 3
—
Note
Use for RHS150
Speed-- Up Configuration
Point Name
Type of I/O
Connection Pin Number
Unit Connection
Speed --- Up Jumper
—
JMP17
—
Speed --- Up Jumper
—
JMP18
—
Note
Jumper for 1--- 3 seconds: Factory Test — The defrost interval timing is reduced by a factor of 0.1 seconds/minute based on the positions of
DIP switches SW1 and SW2 (i.e. 90 minutes will be reduced to 9 seconds).
Jumper for 5--- 20 seconds: Forced Defrost — Defrost runs for 30 seconds if DFT2 is open.
a50_9709
Fig. 35 - Defrost Control Board Location
Table 6 – DIP Switch Position
Switch No.
1
1
0
2
J
30 minutes
22
1
1
J
0
2
J
1
0
J
60 minutes
(Factory default)
2
1
1
J
J
1
2
J
J
0
90 minutes
Specifications are subject to change without notice.
3
1
J
0
120 minutes
On
Off
Fan Delay
516 01 2801 03
The continuous run period is a fixed time period between the
end of the last defrost cycle (or start of the current Heating
cycle) during which no defrost will be permitted. This period
can be set at 30, 60, 90 or 120 minutes by changing the
positions of DIP switches SW1 and SW2 (see Fig. 36 and
Table 6). The default run period is 60 minutes for RHS150
units.
Fig. 37 - Thermostat Wire Routing
C10018
Heat Anticipator Settings —
a50--- 9688
Fig. 36 - DIP Switch Settings — Defrost Board
Shorting the jumpers for a period of 5 to 20 seconds
bypasses the remaining continuous run period and places
the unit in a Forced Defrost mode. If the controlling DFT
is closed when this mode is initiated, the unit will
complete a normal defrost period that will terminate when
the controlling DFT opens or the 10 minute defrost cycle
limit is reached. If the controlling DFT is open when this
mode is initiated, the Defrost cycle will run for 30
seconds. Both modes end at the end of the Defrost cycle.
Unit Without Thru-- Base Connection Kit —
Pass the thermostat control wires through the bushing on
the unit end panel. Route the wire through the snap-- in
wire tie and up to the web bushing near the control box.
Route the wire through the bushing and into the bottom
left side of the control box after removing one of the two
knockouts in the corner of the box. Using a connector at
the control box to protect the wire as it passes into the
control box. Pull the wires over to the terminal strip at the
upper left corner of the Central Terminal Board (CTB).
Use the connector at the control box and the wire tie to
ensure that the thermostat wire is tight and will not be
damaged by contact with the condenser coil. See Fig. 37.
NOTE: If thru-- the-- bottom connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.
516 01 2801 03
Set heat anticipator settings at 0.14 amp for the first stage
and 0.14 amp for second-- stage heating, when available.
Electric Heaters
RHS150 units may be equipped with field-- installed
accessory electric heaters. The heaters are modular in
design, with heater frames holding open coil resistance
wires strung through ceramic insulators, line-- break limit
switches and a control contactor. One or two heater
modules may be used in a unit.
Heater modules are installed in the compartment below
the indoor (supply) fan outlet. Access is through the
indoor access panel. Heater modules slide into the
compartment on tracks along the bottom of the heater
opening. See Fig. 38.
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Not all available heater modules and single point
boxes may be used in every unit. Use only those
heater modules that are UL listed for use in a specific
size unit. Refer to the label on the unit cabinet for the
list of approved heaters and single point boxes.
Specifications are subject to change without notice.
23
SINGLE
POINT BOX
HEATER
COVERS
MANUAL RESET
LIMIT SWITCH
DISCONNECT
MOUNTING
LOCATION
SINGLE POINT
BOX
MOUNTING
SCREW
HEATER
MODULE
(LOCATION 1)
HEATER
MODULE
(LOCATION 2)
HEATER
MOUNTING
BRACKET
C10029
Fig. 38 - Typical Component Location
Single Point Boxes
Heater and Supplementary Fuses —
When heaters are installed, power wiring to both heaters
and the rest of the unit is connected via the single point
box accessory, which will be installed directly under the
unit control box, just to the left of the partition separating
the indoor section (with electric heaters) from the outdoor
section. The single point box has a hinged access cover.
See Fig. 39. The single point box also includes pigtails to
complete the wiring between the single point box and the
unit’s main control box terminals. Refer to the accessory
heater and Single Point Box installation instructions for
details on tap connections.
21
11
23
13
CONTROL
BOX
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
DRIP BOOT
BRACKET
MOUNTING
SCREWS
POWER
WIRES
FOAM
BUSHING
ALLIED PA
CORP.
MODEL NO.
OD
ERIAL NO.
22.2
ISTED AIR
NDITIONING
UIP ACCESS
346N.
P/N
23
2-
1
3
5610-4
REV
HEATER
RELAYS
HEATER
MOUNTING
SCREWS
Fig. 39 - Typical Single Point Installation
C14253
When the unit MOCP device value exceeds 60-- A,
unit-- mounted supplementary fuses are required for each
heater circuit. These fuses are included in accessory
Single Point Boxes, with power distribution and fuse
blocks.
All fuses on RHS150 units are 60-- A. (Note that all heaters
are qualified for use with a 60-- A fuse, regardless of actual
heater ampacity, so only 60-- A fuses are necessary.)
Heater Low-- Voltage Control Connections —
One or two heaters can be installed in the unit (see Fig. 40).
Use the wiring procedure listed below for each heater as
determined by the number of stages in the heater.
Single Stage Heaters: Single-- stage heaters will have an
orange and a brown control wire. Connect these to the
orange and brown wires located on TB4.
Two Stage Heaters: Two-- stage heaters will have orange,
purple, red and brown wires. The orange and the purple
are the control wires and the red and brown wires feed the
safety circuit. Connect both the orange and the purple
wires to the orange wire locations of TB4. Connect the
red and brown wires to red and brown wires on TB4. If
more than one heater is installed, repeat the wiring
procedure for the second heater. The 3 locations across
the top of TB4 do allow a switch to be installed in series
with some of the heaters in order to add additional heater
control.
2--Speed Indoor Fan Motor System
with Variable Frequency Drive (Factory Option)
For details on operating RHS150 2 stage cooling units
equipped with the factory installed Variable Frequency Drive
(VFD) option, refer to the Variable Frequency Drive (VFD)
Installation, Start-- Up and Service Instructions.
24
Specifications are subject to change without notice.
516 01 2801 03
NOTE:
Optional Outdoor Temperature Control
at One Heater Stage –
Move either heater wire to this terminal
and connect outdoor temperature switch
between 2nd and 3rd terminals.
Fig. 40 - Accessory Electric Heater Control Connections
EconoMi$erR X (Factory--Installed Option)
C10354
The W7220 economizer module automatically detects
sensors by polling to determine which sensors are present.
If a sensor loses communications after it has been
detected, the W7220 economizer controller indicates a
device fail error on its LCD.
System Components —
The EconoMi$er X system includes an economizer module,
20k mixed air sensor, damper actuator, and either a 20k
outdoor air temperature sensor or S--Bus enthalpy sensors.
Economizer Module: This is the core of the EconoMi$er X
system, is mounted in the unit’s control box, and includes
the user interface for the system. The W7220 economizer
module provides the basic inputs and outputs to provide
simple economizer control. When used with the optional
sensors, the economizer module provides more advanced
economizer functionality.
Fig. 41 - W7220 Economizer Module
C14154
Product Description —
The EconoMi$er X system is an expandable economizer
control system, which includes a W7220 economizer
module (controller) with an LCD and keypad. The W7220
can be configured with optional sensors.
The W7220 economizer module can be used as a
stand-- alone economizer module wired directly to a
commercial set-- back space thermostat and sensors to
provide outside air dry-- bulb economizer control.
The W7220 economizer module can be connected to
optional sensors for single or differential enthalpy control.
The W7220 economizer module provides power and
communications for the sensors.
516 01 2801 03
S-- Bus Enthalpy Control Sensors: The S-- Bus enthalpy
control sensor is a combination temperature and humidity
sensor which is powered by and communicates on the
S-- Bus. Up to three sensors may be configured with the
W7220 economizer module. See page 27 for details.
CO2 Sensor (optional): A CO2 sensor can be added for
Demand Controlled Ventilation (DCV).
Specifications
W7220 Economizer Module —
The module is designed for use with 2 to 10 Vdc or bus
communicating actuator. The module includes terminals
for CO2 sensor, mixed air sensor, and an outdoor dry bulb
sensor. Enthalpy and other options are available with bus
sensors.
Specifications are subject to change without notice.
25
User Interface: Provides status for normal operation,
setup parameters, checkout tests, and alarm and error
conditions with a 2-- line 16 character LCD display and
four button keypad.
Environmental —
Electrical —
Storage Temperature: - 40 to 150_F (-- 40 to 65_C)
Rated Voltage: 20 to 30 Vac RMS, 50/60 Hz
Transformer: 100 va maximum system input
Shipping Temperature: - 40 to 150_F (-- 40 to 65_C)
Nominal Power Consumption (at 24 Vac, 60 Hz):
11.5 VA without sensors or actuators
Relay Digital Output Rating at 30 Vac (maximum
power from Class 2 input only): 1.5A run:
3.5A inrush at 0.45PF (200,000 cycles) or
7.5A inrush at 0.45PF (100,000 cycles)
External Sensors Power Output: 21 Vdc  5% at 48mA
Operating Temperature: - 40 to 150_F (-- 40 to 65_C).
Exception of display operation down to - 4_F with full
recovery at - 4_F from exposure to - 40_F
Relative Humidity: 5% to 95% RH non-- condensing
Economizer Module Wiring Details —
Use Fig. 42 and Tables 7 and 8 to locate the wiring
terminals for the economizer module.
NOTE: The four terminal blocks are removable. You can
slide out each terminal block, wire it, and then slide it
back into place.
IMPORTANT: All inputs and outputs must be Class 2
wiring.
W7220 Controller
Inputs —
Sensors:
NOTE: A mixed air (MA) analog sensor is required on
all W7220 units; either an outdoor air (OA) sensor for dry
bulb change over or an OA bus sensor for outdoor
enthalpy change over is required in addition to the MA
sensor. An additional return air (RA) bus sensor can be
added to the system for differential enthalpy or dry bulb
changeover. For differential dry bulb changeover a 20k
ohm sensor is required in the OA and a bus sensor in the
RA. DIP switch on RA bus sensor must be set in the RA
position.
Dry Bulb Temperature (optional) and Mixed Air
(required), 20k NTC:
2-- wire (18 to 22 AWG);
Temperature range - 40 to 150_F (-- 40 to 65_C).
Temperature accuracy - 0_F/+2_F
Temperature and Humidity, C7400S1000 (optional):
S-- Bus; 2-- wire (18 to 22 AWG)
Temperature: range - 40 to 150_F (-- 40 to 65_C)
Temperature accuracy - 0_F/+2_F
Humidity: range 0 to 100% RH with 5% accuracy.
NOTE: The bottom 4 Pin actuator header is not used
Left Terminal
Block Label
Right Terminal
Block Label
C14156
Fig. 42 - W7220 Economizer Module Terminal
Connection Labels
Table 7 – Economizer Module Left Hand Terminal Blocks
Label
Type
Description
Top Left Terminal Block
MAT
MAT
20k NTC
and
COM
Supply Air Temperature Sensor
(polarity insensitive connection)
OAT
OAT
20k NTC
and
COM
Outdoor Air Temperature Sensor
(polarity insensitive connection)
S--- BUS
S--- BUS
S--- Bus
(Sylk* Bus)
Enthalpy Control Sensor
(polarity insensitive connection)
IAQ 2--- 10
2--- 10 Vdc
Air Quality Sensor Input
(e.g. CO2 sensor)
Actuator signal: 2-- 10 Vdc; minimum actuator impedance
is 2k ohm; bus two-- wire output for bus communicating
actuators.
IAQ COM
COM
Air Quality Sensor Common
IAQ 24V
24 Vac
Air Quality Sensor 24 Vac Source
ACT 2--- 10
2--- 10 Vdc
Damper Actuator Output (2--- 10 Vdc)
Exhaust fan, Y1, Y2 and AUX1 O:
All Relay Outputs (at 30 Vac):
Running: 1.5A maximum
Inrush: 7.5A maximum
ACT COM
COM
Damper Actuator Output Common
ACT 24V
24 Vac
Damper Actuator 24 Vac Source
n/a
The bottom pin is not used.
NOTE: Up to three (3) S-- Bus sensors may be connected
to the W7220 economizer module. For outdoor air (OA),
return air (RA) and discharge (supply) air (DA).
4 Binary inputs:
1--wire 24 Vac + common GND (see page 27 for wiring
details). 24 Vac power supply: 20 to 30 Vac 50/60Hz;
100 VA Class 2 transformer.
Outputs —
26
Bottom Left Terminal Block
* Sylk is a trademark of Honeywell International Inc.
Specifications are subject to change without notice.
516 01 2801 03
Table 8 – Economizer Module Right Hand Terminal Blocks
Label
Type
Description
Top Right Terminal Block
n/a
The first pin is not used
AUX2 I
24 Vac IN
Shut Down (SD) or Heat (W)
Conventional only
or
Heat Pump Changeover (O/B) in
Heat Pump mode.
OCC
24 Vac IN
Occupied / Unoccupied Input
E--- GND
E--- GND
Earth Ground --- System Required
EXH1
24 Vac OUT
Exhaust Fan 1 Output
AUX1 O
24 Vac OUT
Programmable:
Exhaust fan 2 output
or
Erv
or
System Alarm output
DIP
Switch
Label
DIP
Switches
(3)
Bottom Right Terminal Block
Y2--- I
24 Vac IN
Y2 in --- Cooling Stage 2 Input from
space thermostat
Y2--- O
24 Vac OUT
Y2 out --- Cooling Stage 2 Output to
stage 2 mechanical cooling
Y1--- I
24 Vac IN
Y1 in --- Cooling Stage 1 Input from
space thermostat
Y1--- O
24 Vac OUT
Y1 out --- Cooling Stage 1 Output to
stage 1 mechanical cooling
C
COM
24 Vac Common
R
24 Vac
24 Vac Power (Hot)
S-- Bus Sensor Wiring —
The labels on the sensors and controller are color coded
for ease of installation. Orange labeled sensors can only
be wired to orange terminals on the controller. Brown
labeled sensors can only be wired to S-- Bus (brown)
terminals. Use Fig. 43 and Table 9 to locate the wiring
terminals for each S-- Bus sensor.
Use Fig. 43 and Table 10 to set the DIP switches for the
desired use of the sensor.
Table 9 – Enthalpy Control Sensor Wiring Terminations*
Terminal
*
Type
Fig. 43 - S-- Bus Sensor DIP Switches
CO2 Sensor Wiring —
When using a CO2 sensor the black and brown common
wires are internally connected and only one is connected
to “IAQ COM” on the W7220. Use the power from the
W7220 to power the CO2 sensor OR make sure the ground
for the power supplies are common. See Fig. 44 for CO2
sensor wiring.
CO2 SENSOR
RED
Label
1
S--- BUS
S--- BUS
S--- Bus Communications
(Enthalpy Control Sensor Bus)
2
S--- BUS
S--- BUS
S--- Bus Communications
(Enthalpy Control Sensor Bus)
C14178
NOTE: When a S-- Bus sensor is connected to an existing
network, it will take 60 minutes for the network to
recognize and auto-- configure itself to use the new sensor.
During the 60 minute setup period, no alarms for sensor
failures (except SAT) will be issued and no economizing
function will be available.
Description
Nbr
24V
BLACK
+
ANALOG
OUT
Terminals are polarity insensitive.
L1
(HOT)
L2
1
YELLOW
BROWN
–
ORANGE
Table 10 – Enthalpy Control Sensor DIP Switch Settings
Use
S-Bus
2 Pin Side
Connector
S-Bus
Terminals
(1 and 2)
GREEN
DIP Switch Positions for Switches 1, 2, and 3
1
2
3
OFF
ON
OFF
RA [
ON
OFF
OFF
OA **
OFF
OFF
OFF
DA *
* DA = Discharge Air
[ RA = Return Air
** OA = Outside Air
516 01 2801 03
1
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
Fig. 44 - Wiring for CO2 Sensor
Specifications are subject to change without notice.
C14158
27
Interface Overview
This section describes how to use the economizer’s user
interface for:
S Keypad and menu navigation
S Settings and parameter changes
S Menu structure and selection
User Interface —
The user interface consists of a 2-- line LCD display and a
4-- button keypad on the front of the economizer controller.
button to increase (change) the displayed
5. Press the
parameter value.
button to decrease (change) the displayed
6. Press the
parameter value.
NOTE: When values are displayed, pressing and
holding the
or
button causes the
display to automatically increment.
7. Press the
(Enter) button to accept the displayed
value and store it in nonvolatile RAM.
8. “CHANGE STORED” displays.
(Enter) button to return to the current
9. Press the
menu parameter.
(Menu Up/Exit) button to return to the
10. Press the
previous menu.
Menu Structure
2 LINE
LCD
Table 11 illustrates the complete hierarchy of menus and
parameters for the EconoMi$erR X system.
The Menus in display order are:
S STATUS
S SETPOINTS
S SYSTEM SETUP
MENU UP
(EXIT)
BUTTON
SCROLL
UP/DOWN
BUTTONS
S ADVANCED SETUP
SELECT
(ENTER)
BUTTON
Fig. 45 - W7220 Controller
S CHECKOUT
C14206
Keypad —
The four navigation buttons (see Fig. 45) are used to scroll
through the menus and menu items, select menu items,
and to change parameter and configuration settings.
To use the keypad when working with menus:
S Press the
menu.
(Up arrow) button to move to the previous
S Press the
menu.
(Down arrow) button to move to the next
S ALARMS
IMPORTANT: Table 11 illustrates the complete
hierarchy. Your menu parameters may be different
depending on your configuration.
For example if you do not have a DCV (CO2) sensor, then
none of the DCV parameters appear and only MIN POS
will display. If you have a CO2 sensor, the DCV MIN and
DCV MAX will appear AND if you have 2 speed fan
DCV MIN (high and low speed) and DCV MAX (high
and low speed will appear).
(Enter) button to display the first item in
S Press the
the currently displayed menu.
NOTE: Some parameters in the menus use the letters MA
or MAT, indicating a mixed air temperature sensor
location before the cooling coil. This unit application has
the control sensor located after the cooling coil, in the fan
section, where it is designated as (Cooling) Supply Air
Temperature or SAT sensor.
(Menu Up/Exit) button to exit a menu’s
S Press the
item and return to the list of menus.
Setup and Configuration
To use the keypad when working with Setpoints, System
and Advanced Settings, Checkout tests and Alarms:
1. Navigate to the desired menu.
2. Press the
(Enter) button to display the first item in
the currently displayed menu.
and
buttons to scroll to the desired
3. Use the
parameter.
(Enter) button to display the value of the
4. Press the
currently displayed item.
28
Before being placed into service, the W7220 economizer
module must be setup and configured for the installed
system.
IMPORTANT: During setup, the economizer module is
live at all times.
The setup process uses a hierarchical menu structure that
and
arrow buttons to
is easy to use. You press the
move forward and backward through the menus and press
button to select and confirm setup item changes.
the
Specifications are subject to change without notice.
516 01 2801 03
Time-- out and Screensaver —
When no buttons have been pressed for 10 minutes, the
LCD displays a screen saver, which cycles through the
Status items. Each Status items displays in turn and cycles
to the next item after 5 seconds.
Table 11 – Menu Structure *
Menu
STATUS
Parameter
Parameter
Default
Value
Parameter
Range and Increment [
EXPANDED PARAMETER NAME
Notes
ECON AVAIL
NO
YES/NO
ECONOMIZING AVAILABLE
YES = economizing available; the system can use outside air for free
cooling when required
ECONOMIZING
NO
YES/NO
ECONOMIZING ACTIVE
YES = Outside air being used for first stage cooling.
NO = Economizing not active
OCCUPIED
NO
YES/NO
OCCUPIED
YES = OCC signal received from space thermostat
or unitary controller.
YES = 24 Vac on terminal OCC.
NO = 0 Vac on terminal OCC.
HEAT PUMP
n/a**
COOL
HEAT
HEAT PUMP MODE
Displays COOL or HEAT when system is set to heat pump
(non---conventional)
COOL Y1 ---IN
OFF
ON/OFF
FIRST STAGE COOLING DEMAND (Y1---IN)
Y1---I signal from space thermostat or unitary controller for Cooling Stage 1.
ON = 24 Vac on terminal Y1---I
OFF = 0 Vac on terminal Y1---I
COOL Y1 ---OUT
OFF
ON/OFF
FIRST STAGE COOLING RELAY OUTPUT
Cool Stage 1 Relay Output to mechanical cooling (Y1---OUT terminal).
COOL Y2 ---IN
OFF
ON/OFF
SECOND STAGE COOLING DEMAND (Y2---IN)
Y2---I signal from space thermostat or unitary controller for Cooling Stage 2.
ON = 24 Vac on terminal Y2---I
OFF = 0 Vac on terminal Y2---I
COOL Y2 ---OUT
OFF
ON/OFF
SECOND STAGE COOLING RELAY OUTPUT
Cool Stage 2 Relay Output to mechanical cooling (Y2---OUT terminal).
MA TEMP
_ _.__F
(or _ _.__C)
---40 to 150_F
( ---18 to 60_C)
SUPPLY AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed/cooled air from SAT sensor in fan
section.
Displays --- ---.--- if not connected, short or out---of---range. See Menu Note 2
DA TEMP
_ _.__F
(or _ _.__C)
---40 to 150_F
( ---18 to 60_C)
DISCHARGE AIR TEMPERATURE, after Heating section
(Accessory sensor required)
Displays when Discharge Air sensor is connected and displays measured
discharge temperature.
Displays --- ---.---_F if sensor sends invalid value, if not connected, short or
out---of---range.
OA TEMP
_ _.__F
(or _ _.__C)
---40 to 140_F
( ---40 to 60_C)
OUTSIDE AIR TEMPERATURE
Displays measured value of outdoor air temperature.
Displays --- ---_F if sensor sends invalid value, if not connected, short or
out---of---range.
OA HUM
_ _%
0 to 100%
OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA enthalpy sensor.
RA TEMP
_ _.__F
(or _ _.__C)
0 to 140_F
( ---18 to 60_C)
RETURN AIR TEMPERATURE
(Accessory sensor required)
Displays measured value of return air temperature from RAT sensor.
Displays --- ---_F if sensor sends invalid value, if not connected, short or
out---of---range.
RA HUM
_ _%
0 to 100%
RETURN AIR RELATIVE HUMIDITY
(Accessory enthalpy sensor required)
Displays measured value of return air humidity from RA sensor.
Displays --- ---% if sensor sends invalid value, if not connected, short or
out---of---range.
IN CO2
_ _ _ ppm
0 to 2000 ppm
SPACE/RETURN AIR CO2
(CO2 sensor required, accessory or factory option)
Displays value of measured CO2 from CO2 sensor.
Invalid if not connected, short or out---of---range. May be adjusted in
Advanced menu by Zero offset and Span.
DCV STATUS
n/a
ON/OFF
DEMAND CONTROLLED VENTILATION STATUS
(CO2 sensor required, accessory or factory option)
Displays ON if IN CO2 value above setpoint DCV SET and OFF if below
setpoint DCV SET.
DAMPER OUT
2.0V
2.0 to 10.0V
Displays output voltage or position to the damper actuator. ***
ACT POS
n/a
0 to 100%
Displays actual position of outdoor air damper actuator
ACT COUNT
n/a
1 to 65535
Displays number of times actuator has cycled.
1 Cycle equals accrued 180_ of actuator movement in any direction
516 01 2801 03
Specifications are subject to change without notice.
29
Table 11 - Menu Structure * (cont)
Menu
STATUS
(cont)
SETPOINTS
Parameter
Parameter
Default
Value
Parameter
Range and Increment [
EXPANDED PARAMETER NAME
Notes
ACTUATOR
n/a
OK/Alarm
(on Alarm menu)
Displays Error if voltage or torque is below actuator range
EXH1 OUT
OFF
ON/OFF
EXHAUST STAGE 1 RELAY OUTPUT
Output of EXH1 terminal. Displays On when damper position reaches
programmed percentage setpoint.
ON = 24 Vac Output; OFF = No Output.
EXH2 OUT
OFF
ON/OFF
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX1 O terminal Displays ON when damper position reaches
programmed percentage setpoint
ON = 24 Vac Output, OFF = No Output; displays only if AUX1 O =
EXH2
ERV
OFF
ON/OFF
ENERGY RECOVERY UNIT RELAY OUTPUT
Output of AUX1 O terminal, ON = 24 Vac Output, OFF = No Output;
displays only if AUX1 O = ERV
MECH COOL ON
or
HEAT STAGES ON
0
0, 1, or 2
Displays stage of mechanical cooling that is active.
FAN SPEED
n/a
LOW or HIGH
SUPPLY FAN SPEED
Displays speed setting of fan on a 2---speed fan unit.
W (HEAT ON)
n/a
ON/OFF
HEAT DEMAND STATUS
Displays status of heat demand on a 2---speed fan unit.
MAT SET
53_F
(12_C)
38 to 70_F;
(3 to 21_C)
increment by 1
SUPPLY AIR SETPOINT
Setpoint determines where the economizer will modulate the OA damper to
maintain the mixed air temperature.
See Menu Note 2.
LOW T LOCK
32_F
(0_C)
---45 to 80_F;
( ---43 to 27_C)
increment by 1
COMPRESSOR LOW TEMPERATURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical cooling
cannot be turned on. Commonly referred to as the Compressor lockout. At
or below the setpoint the Y1---O and Y2---O will not be energized on the
controller.
DRYBLB SET
63_F
(17_C)
48 to 80_F
(9 to 27_C)
increment by 1
OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT
Setpoint determines where the economizer will assume outdoor air
temperature is good for free cooling; e.g.: at 63_F (17_C), unit will
economize at 62_F (16.7_C) and below and not economize at 64_F
(17.8_C) and above. There is a 2_F (1.1_C) deadband.
See Menu Note 3
ENTH CURVE
ES3
ES1, ES2, ES3, ES4, or
ES5
ENTHALPY CHANGEOVER CURVE
(Requires enthalpy sensor option)
Enthalpy boundary “curves” for economizing using single enthalpy.
See page 38 for description of enthalpy curves.
DCV SET
1100ppm
500 to 2000 ppm;
increment by 100
DEMAND CONTROLLED VENTILATION SETPOINT
Displays only if CO2 sensor is connected. Setpoint for Demand Controlled
Ventilation of space. Above the setpoint, the OA dampers will modulate
open to bring in additional OA to maintain a space ppm level below the
setpoint.
MIN POS
2.8 V
2 to 10 Vdc
VENTILATION MINIMUM POSITION
Displays ONLY if a CO2 sensor is NOT connected.
Displays the stage of heat pump heating that is active
With 2---speed fan units MIN POS L (low speed fan) and MIN POS H (high
speed fan) settings are required. Default for MIN POS L is 3.2V and MIN
POS H is 2.8V.
VENTMAX
VENTMIN
30
2.8 V
2.25 V
2 to 10 Vdc
DCV MAXIMUM DAMPER POSITION
Displays only if a CO2 sensor is connected. Used for Vbz (ventilation max
cfm) setpoint. VENTMAX is the same setting as MIN POS would be if you
did not have the CO2 sensor.
100 to 9990 cfm
increment by 10
If OA, MA RA and CO2 sensors are connected and DCV CAL ENABLE is
set to AUTO mode, the OA dampers are controlled by CFM and displays
from 100 to 9990 cfm.
2 to 10 Vdc
With 2---speed fan units VENTMAX L (low speed fan) and VENTMAX H
(high speed fan) settings are required. Default for VENTMAX L is 3.2V and
VENTMAX H is 2.8V.
2 to 10 Vdc
DCV MINIMUM DAMPER POSITION
Displays only if CO2 sensor is connected. Used for Va (ventilation min cfm)
setpoint. This is the ventilation requirement for less than maximum
occupancy of the space.
100 to 9990 cfm
increment by 10
If OA, MA RA and CO2 sensors are connected and DCV CAL ENABLE is
set to AUTO mode, the OA dampers are controlled by CFM and displays
from 100 to 9990 cfm.
2 to 10 Vdc
With 2 ---speed fan units VENTMIN L (low speed fan) and VENTMIN H
(high speed fan) settings are required. Default for VENTMIN L is 2.5V
and VENTMIN H is 2.25V.
Specifications are subject to change without notice.
516 01 2801 03
Table 11 - Menu Structure* (cont)
Menu
SETPOINTS
(cont)
SYSTEM
SETUP
Parameter
Parameter
Default
Value
Parameter
Range and Increment[
EXPANDED PARAMETER NAME
Notes
ERV OAT SP[[
32_F
(0_C)
0 to 50_F;
( ---18 to 10_C)
increment by 1
ENERGY RECOVERY VENTILATION UNIT OUTDOOR AIR TEMPERATURE
SETPOINT
Only when AUX1 O = ERV
EXH1 SET
50%
0 to 100%;
Increment by 1
EXHAUST FAN STAGE 1 SETPOINT
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer.
With 2---speed fan units Exh1 L (low speed fan) and Exh1 H (high speed
fan) settings are required. Default for Exh1 L is 65% and Exh1 H is 50%
EXH2 SET
75%
0 to 100%;
Increment by 1
EXHAUST FAN STAGE 2 SETPOINT
Setpoint for OA damper position when exhaust fan 2 is powered by the
economizer. Only used when AUX1 O is set to EHX2.
With 2---speed fan units Exh2 L (low speed fan) and Exh2 H (high speed
fan) settings are required. Default for Exh2 L is 80% and Exh2 H is 75%
INSTALL
01/01/10
UNITS DEG
_F
_F or _C
Sets economizer controller in degrees Fahrenheit or Celsius.
EQUIPMENT
CONV
Conventional or HP
CONV = conventional;
HP O/B = Enable Heat Pump mode. Use AUX2 I for Heat Pump input from
thermostat or controller.
See Menu Note 4
AUX2 IN
n/a
Shutdown (SD)
Heat (W1)
HP (O)
HP (B)
In CONV mode:
SD = Enables configuration of shutdown (default);
W = Informs controller that system is in heating mode.
NOTE: If using 2---speed fan mode, you must program CONV mode
for W. Shutdown is not available in 2---speed fan mode.
See Menu Note 4.
Display order = MM/DD/YY
Setting order = DD, MM, then YY.
In HP O/B mode:
HP(O) = energize heat pump on Cool (default);
HP(B) = energize heat pump on Heat.
FAN SPEED
1speed
1 speed/
2 speed
Sets economizer controller for operation of 1 speed or 2 speed supply fan.
The controller does not control the fan but positions the OA and RA
dampers to the heating or cooling mode. See page 32 for modes and
position.
NOTE: 2---speed fan option also needs Heat (W1) programmed in
AUX 2 In. See Menu Note 4.
FAN CFM
5000cfm
100 to 15000 cfm;
increment by 100
UNIT DESIGN AIRFLOW (CFM)
Enter ONLY if using DCVCAL ENA = AUTO
The value is found the nameplate label for the specific RTU.
AUX1 OUT
NONE
NONE
ERV
EXH2
SYS
Select OUTPUT for AUX1 O relay
NONE = not configured (output is not used)
ERV = Energy Recovery Ventilator[[
EXH2 = second damper position 24 Vac out for second exhaust fan
SYS = use output as an alarm signal
OCC
INPUT
INPUT or ALWAYS
OCCUPIED MODE BY EXTERNAL SIGNAL
When using a setback thermostat with occupancy out (24 Vac), the 24 Vac
is input “INPUT” to the OCC terminal. If no occupancy output from the
thermostat then change program to “ALWAYS” OR add a jumper from
terminal R to OCC terminal.
See Menu Note 1.
FACTORY DEFAULT
NO
NO or YES
Resets all set points to factory defaults when set to YES. LCD will briefly
flash YES and change to NO but all parameters will change to the factory
default values.
NOTE: RECHECK AUX2 IN and FANTYPE for required 2---speed
values.
516 01 2801 03
Specifications are subject to change without notice.
31
Table 11 - Menu Structure* (cont)
Menu
ADVANCED
SETUP
CHECKOUT
[[[
32
Parameter
Parameter
Default
Value
Parameter
Range and Increment[
EXPANDED PARAMETER NAME
Notes
MA LO SET
45_F
(7_C)
35 to 65_F;
(2 to 18_C)
Incremented by 1_
SUPPLY AIR TEMPERATURE LOW LIMIT
Temperature to activate Freeze Protection (close damper and alarm if
temperature falls below setup value)
FREEZE POS
CLO
CLO or MIN
FREEZE PROTECTION DAMPER POSITION
Damper position when freeze protection is active
CLO = closed
MIN = MIN POS or VENTMAX
CO2 ZERO
0ppm
0 to 500 ppm:
Increment by 10
CO2 ppm level to match CO2 sensor start level.
CO2 SPAN
2000ppm
1000 to 3000 ppm;
Increment by 50
CO2 ppm span to match CO2 sensor. e.g.; 500---1500 sensor output would
be 500 CO2 zero and 1000 CO2 span.
STG3 DLY
2.0h
0 min, 5 min, 15 min,
then 15 min intervals.
Up to 4 h or OFF
COOLING STAGE 3 DELAY
Delay after stage 2 for cool has been active. Turns on second stage of
mechanical cooling when economizer is first stage call and mechanical
cooling is second stage call. Allows three stages of cooling, 1
economizer and 2 mechanical.
OFF = no Stage 3 cooling.
SD DMPR POS
CLO
CLO or OPN
Indicates shutdown signal from space thermostat or unitary controller.
When controller receives 24 Vac input on the SD terminal in conventional
mode, the OA damper will open if programmed for OPN and OA damper
will close if programmed for CLO. All other controls, e.g., Y1---O, Y2---O,
EXH1, etc. will shut off.
NOTE: Function NOT AVAILABLE with 2---speed mode
DA LO ALM
45_F
(7_C)
NONE
35 to 65_F; (2 to 18_C)
Incremented by 5_
Used for alarm for when the DA air temperature is too low. Set lower range
of alarm, below this temperature the alarm will show on the display.
DA HI ALM
80_F
(27_C)
NONE
70 to 180_F; (21 to 82_C)
Incremented by 5_
Used for alarm for when the DA air temperature is too high. Set high range
of alarm, above this temperature the alarm will show on the display
DCVCAL ENA
MAN
MAN (manual)
AUTO
Turns on the DCV automatic control of the dampers. Resets ventilation
based on the RA, OA and MA sensor conditions. Requires all sensors (RA,
OA, MA and CO2).
NOTE: This operation is not operable with a 2---speed fan unit.
MAT T CAL
0.0_F
(or C)
+/ ---2.5_F
(+/ ---1.4_C)
SUPPLY AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration supply air
temperature (SAT) sensor
OAS T CAL
1.0_F
(or C)
+/ ---2.5_F
(+/ ---1.4_C)
OUTSIDE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration outside air
temperature (OAT) sensor
OAS H CAL
0% RH
+/ ---10% RH
OUTSIDE AIR HUMIDITY CALIBRATION
Allows for the operator to adjust for an out of outside air enthalpy sensor
RA T CAL
0.0_F
(or C)
+/ ---2.5_F
(+/ ---1.4_C)
RETURN AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration return air
temperature (RA) sensor
RA H CAL
0% RH
+/ ---10% RH
RETURN AIR HUMIDITY CALIBRATION
Allows for the operator to adjust for an out of calibration return air enthalpy
sensor
DA T CAL
0.0_F
(or C)
+/ ---2.5_F
(+/ ---1.4_C)
DISCHARGE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration discharge air
temperature (DAT) sensor
2SP FAN DELAY
5 Minutes
0 to 20 minutes in
1 minute increments
TIME DELAY ON 2nd STAGE ECONOMIZING
When in economizing mode this is the delay for the high speed fan to try to
satisfy the call for second stage cooling before the first stage mechanical
cooling is enabled.
DAMPER MINIMUM
POSITION
n/a
n/a
The checkout for the damper minimum positions is based on the system.
See Table 12.
DAMPER OPEN
n/a
n/a
Positions damper to the full open position.
Exhaust fan contacts enable during the DAMPER OPEN test. Make sure
you pause in this mode to allow for exhaust contacts to energize due to the
delay in the system.
DAMPER CLOSE
n/a
n/a
Positions damper to the fully closed position
CONNECT Y1 ---O
n/a
n/a
Closes the Y1---O relay (Y1---O).
See CAUTION on page 39.
CONNECT Y2 ---O
n/a
n/a
Closes the Y2---O relay (Y2---O)
See CAUTION on page 39.
CONNECT AUX1 ---O
n/a
n/a
Energizes the AUX1---O output. If AUX1---O setting is:
S NONE --- not action taken
S ERV --- 24 Vac out. Turns on or signals an ERV that the conditions
are not good for economizing but are good for ERV operation. [[
S SYS --- 24 Vac out. Issues a system alarm.
CONNECT EXH1
n/a
n/a
Closes the power exhaust fan 1 relay (EXH1)
Specifications are subject to change without notice.
516 01 2801 03
Table 11 - Menu Structure* (cont)
Menu
Parameter
Parameter
Default
Value
Parameter
Range and Increment [
ALARMS(#)
EXPANDED PARAMETER NAME
Notes
Alarms display only when they are active. The menu title
“ALARMS(#)” includes the number of active alarms in parenthesis ( ).
When using S---Bus sensors, “SYLK” will appear on the screen, and
when using 20k OA temperature sensors, “SENS T” will appear on
the screen.
MA T SENS ERR
n/a
n/a
SUPPLY AIR TEMPERATURE SENSOR ERROR
Supply air sensor has failed or become disconnected --- check wiring
then replace sensor if the alarm continues
CO2 SENS ERR
n/a
n/a
CO2 SENSOR ERROR
CO2 sensor has failed, gone out of range or become disconnected --check wiring then replace sensor if the alarm continues
OA SYLK T ERR
n/a
n/a
OA SYLK H ERR
n/a
n/a
OUTSIDE AIR S---BUS SENSOR ERROR
Outside air enthalpy sensor has failed or become disconnected --- check
wiring then replace sensor if the alarm continues
RA SYLK T ERR
n/a
n/a
RA SYLK H ERR
n/a
n/a
DA SYLK T ERR
n/a
n/a
DISCHARGE AIR S---BUS SENSOR ERROR
Discharge air sensor has failed or become disconnected --- check wiring
then replace sensor if the alarm continues
OA SENS T ERR
n/a
n/a
OUTSIDE AIR TEMPERATURE SENSOR ERROR
Outside air temperature sensor has failed or become disconnected --check wiring then replace sensor if the alarm continues
ACT ERROR
n/a
n/a
ACTUATOR ERROR
Actuator has failed or become disconnected --- check for stall, over
voltage, under voltage and actuator count. Replace actuator if damper is
moveable and supply voltage is between 21.6 V and
26.4 V. Check actuator count on STATUS menu.
FREEZE ALARM
n/a
n/a
Check if outdoor temperature is below the LOW Temp Lockout on
setpoint menu. Check if Mixed air temperature on STATUS menu is
below the Lo Setpoint on Advanced setup menu. When conditions are
back in normal range then the alarm will go away.
SHUTDOWN ACTIVE
n/a
n/a
AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to
AUX 2IN terminal
DMP CAL RUNNING
n/a
n/a
DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, when the W7220 is
completing a calibration on the dampers, this alarm will display. Wait until
the calibration is completed and the alarm will go away. Must have OA,
MA and RA sensors for DCV calibration; set up is in the Advanced setup
menu.
DA SENS ALM
n/a
n/a
DISCHARGE AIR TEMPERATURE SENSOR ALARM
Discharge air temperature is out of the range set in the ADVANCED
SETUP Menu. Check the temperature of the discharge air.
SYS ALARM
n/a
n/a
When AUX1---O is set to SYS and there is any alarm (e.g., failed sensors,
etc.), the AUX1---O terminal has 24 Vac out.
ACT UNDER V
n/a
n/a
ACTUATOR VOLTAGE LOW
Voltage received at actuator is below expected range
ACT OVER V
n/a
n/a
ACTUATOR VOLTAGE HIGH
Voltage received at actuator is above expected range
ACT STALLED
n/a
n/a
ACTUATOR STALLED
Actuator stopped before reaching commanded position
RETURN AIR S---BUS SENSOR ERROR
Return air enthalpy sensor has failed or become disconnected --- check
wiring then replace sensor if the alarm continues
*
Table 11 illustrates the complete hierarchy. Your menu parameters may be different depending on your configuration.
For example if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear.
When values are displayed, pressing and holding the Y or B button causes the display to automatically increment.
** n/a = not applicable
[[ ERV Operation: When in Cooling mode AND the conditions are NOT OK for economizing --- the ERV terminal will be energized.
In the Heating mode the ERV terminal will be energized when the OA is below the ERV OAT setpoint in the setpoint menu.
*** When used with communicating actuator the damper out is reported in XX.X% open verses XX.X Vdc.
[[[ After 10 minutes without a command or mode change, the controller will change to normal operation.
[
Menu Notes
1 STATUS ---> OCCUPIED – The factory-standard Occupancy signal originates with a thermostat or other controller call for indoor fan operation at CTB terminal G. This signal passes through the Central Terminal Board’s OCCUPIED jumper JMP1 to the ECONO connector and to the W7220’s OCC input terminal. An external timeclock or relay is required to implement an Occupancy schedule on the economizer damper position.
2 STATUS -> MA TEMP, SETPOINTS -> MAT SET – The W7220 menu parameters and labels include designations MA, MAT and Mixed Air for the economizer
cooling control sensor. On these rooftop units, the economizer control sensor is located downstream of the evaporator/indoor coil in the supply fan section
where this sensor is designated as Supply Air Temperature (SAT) sensor.
3 SETPOINTS -> DRYBLB SET – This point is not displayed if a Return Air (differential) temperature sensor or an Outdoor Air enthalpy sensor is connected.
4 SYSTEM SETUP parameters must be configured as noted for 2-Speed unit operation:
EQUIPMENT = CONV
AUX2 IN = W
FAN SPEED = 2SPEED
516 01 2801 03
Specifications are subject to change without notice.
33
Table 12 – Damper Minimum Position Settings and Readings on Checkout Menu
Fan Speed
Demand Controlled Ventilation
(CO2 Sensor)
1
NO
MIN POS
VMAX ---HS
1
NO
N/A
N/A
2
NO
MIN POS H
VMAX ---HS
2
NO
MIN POS L
VMAX ---LS
1
YES
VENT MIN
VMIN ---HS
1
YES
VENT MAX
VMAX ---HS
2
YES
VENT MIN H
VMIN ---HS
2
YES
VENT MAX H
VMAX ---LS
2
YES
VENT MIN L
N/A
2
YES
VENT MAX L
N/A
Setpoints
Checkout
Sequence of Operation
Table 13 – Dry Bulb Operation No DCV (CO2 Sensor) - 1 Speed Fan
Demand
Controlled
Ventilation
(DCV)
None
None
*
Outside Air --Good to
economize?
No
Yes
Y1‐I
Y2-I
Fan Speed
Y1-O
Y2-O
Occupied
Unoccupied
Off
Off
High
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
High
24-v/On
0-v/Off
MIN POS
Closed
On
On
High
24-v/On
24-v/On
MIN POS
Closed
Off
Off
High
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
High
0-v/Off
0-v/Off
MIN POS to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off *
MIN POS to Full-Open
Closed to Full-Open
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
Table 14 – Dry Bulb Operation With DCV (CO2 Sensor) - 1 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air --Good to
economize?
No
Below CO2 set
Yes
No
Above CO2 set
Yes
*
Y1‐I
Y2-I
Fan Speed
Y1-O
Y2-O
Occupied
Unoccupied
Off
Off
High
0-v/Off
0-v/Off
VENTMIN
Closed
On
Off
High
24-v/On
0-v/Off
VENTMIN
Closed
On
On
High
24-v/On
24-v/On
VENTMIN
Closed
Off
Off
High
0-v/Off
0-v/Off
VENTMIN
Closed
On
Off
High
0-v/Off
0-v/Off
VENTMIN to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off*
VENTMIN to Full-Open
Closed to Full-Open
Off
Off
High
0-v/Off
0-v/Off
VENTMIN to VENTMAX
Closed
On
Off
High
24-v/On
0-v/Off
VENTMIN to VENTMAX
Closed
On
On
High
24-v/On
24-v/On
VENTMIN to VENTMAX
Closed
Off
Off
High
0-v/Off
0-v/Off
VENTMIN to VENTMAX
Closed
On
Off
High
0-v/Off
0-v/Off
VENTMIN to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off*
VENTMIN to Full-Open
Closed to Full-Open
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
34
Specifications are subject to change without notice.
516 01 2801 03
Table 15 – Enthalpy Operation No DCV (CO2 Sensor) - 1 Speed Fan
Demand
Controlled
Ventilation
(DCV)
None
None
*
Outside Air --Good to
economize?
No
Yes
Y1‐I
Y2-I
Fan Speed
Y1-O
Y2-O
Occupied
Unoccupied
Off
Off
High
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
High
24-v/On
0-v/Off
MIN POS
Closed
On
On
High
24-v/On
24-v/On
MIN POS
Closed
Off
Off
High
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
High
0-v/Off
0-v/Off
MIN POS to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off*
MIN POS to Full-Open
Closed to Full-Open
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
Table 16 – Enthalpy Operation With DCV (CO2 Sensor) - 1 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air --Good to
economize?
No
Below set
Yes
No
Above set
Yes
Y1‐I
Y2-I
Fan Speed
Off
Off
High
0-v/Off
0-v/Off
VENTMIN
Closed
On
Off
High
24-v/On
0-v/Off
VENTMIN
Closed
On
On
High
24-v/On
24-v/On
VENTMIN
Closed
Off
Off
High
0-v/Off
0-v/Off
VENTMIN
Closed
On
Off
High
0-v/Off
0-v/Off
VENTMIN to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off*
VENTMIN to Full-Open
Closed to Full-Open
Off
Off
High
0-v/Off
0-v/Off
VENTMIN to VENTMAX
Closed
On
Off
High
24-v/On
0-v/Off
VENTMIN L to VENTMAX
Closed
On
On
High
24-v/On
24-v/On
VENTMIN H to VENTMAX
Closed
Off
Off
High
0-v/Off
0-v/Off
VENTMIN L to VENTMAX
Closed
On
Off
High
0-v/Off
0-v/Off
VENTMIN to Full-Open
Closed to Full-Open
0-v/Off*
VENTMIN to Full-Open
Closed to Full-Open
On
*
[
On
High
Y1-O
DELAY [
24-v/On
Y2-O
Occupied
Unoccupied
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
516 01 2801 03
Specifications are subject to change without notice.
35
Table 17 – Dry Bulb Operation No DCV (CO2 Sensor) - 2 Speed Fan
Demand
Controlled
Ventilation
(DCV)
None
None
Outside Air --Good to
economize?
No
Yes
Y1‐I
Y2-I
Fan Speed
Off
Off
Low
0-v/Off
0-v/Off
MIN POS L
Closed
On
Off
Low
24-v/On
0-v/Off
MIN POS L
Closed
On
On
High
24-v/On
24-v/On
MIN POS H
Closed
Off
Off
Low
0-v/Off
0-v/Off
MIN POS L
Closed
On
Off
Low
0-v/Off
0-v/Off
MIN POS L to Full-Open
Closed to Full-Open
0-v/Off *
MIN POS H to Full-Open
Closed to Full-Open
On
*
[
On
High
Y1-O
DELAY[
24-v/On
Y2-O
Occupied
Unoccupied
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
Table 18 – Dry Bulb Operation With DCV (CO2 Sensor) - 2 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air --Good to
economize?
No
Below set
Yes
No
Above set
Yes
Y1‐I
Y2-I
Fan Speed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L
Closed
On
Off
Low
24-v/On
0-v/Off
VENTMIN L
Closed
On
On
High
24-v/On
24-v/On
VENTMIN H
Closed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L
Closed
On
Off
Low
0-v/Off
0-v/Off
VENTMIN L to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off*
VENTMIN H to Full-Open
Closed to Full-Open
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L to VENTMAX
Closed
On
Off
Low
24-v/On
0-v/Off
VENTMIN L to VENTMAX
Closed
On
On
High
24-v/On
24-v/On
VENTMIN H to VENTMAX
Closed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L to VENTMAX
Closed
On
Off
Low
0-v/Off
0-v/Off
VENTMIN L to Full-Open
Closed to Full-Open
0-v/Off *
VENTMIN H to Full-Open
Closed to Full-Open
On
*
[
On
High
Y1-O
DELAY [
24-v/On
Y2-O
Occupied
Unoccupied
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
36
Specifications are subject to change without notice.
516 01 2801 03
Table 19 – Enthalpy Operation No DCV (CO2 Sensor) - 2 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air --Good to
economize?
No
NO CO2 SENSOR
Yes
Y1‐I
Y2-I
Fan Speed
Off
Off
Low
0-v/Off
0-v/Off
MIN POS L
Closed
On
Off
Low
24-v/On
0-v/Off
MIN POS L
Closed
On
On
High
24-v/On
24-v/On
MIN POS H
Closed
Off
Off
Low
0-v/Off
0-v/Off
MIN POS L
Closed
On
Off
Low
0-v/Off
0-v/Off
MIN POS L to Full-Open
Closed to Full-Open
0-v/Off *
MIN POS H to Full-Open
Closed to Full-Open
On
*
[
On
High
Y1-O
DELAY[
24-v/On
Y2-O
Occupied
Unoccupied
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
Table 20 – Enthalpy Operation With DCV (CO2 Sensor) - 2 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air --Good to
economize?
No
Below set
Yes
No
Above set
Yes
Y1‐I
Y2-I
Fan Speed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L
Closed
On
Off
Low
24-v/On
0-v/Off
VENTMIN L
Closed
On
On
High
24-v/On
24-v/On
VENTMIN H
Closed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L
Closed
On
Off
Low
0-v/Off
0-v/Off
VENTMIN L to Full-Open
Closed to Full-Open
On
On
High
24-v/On
0-v/Off*
VENTMIN H to Full-Open
[
Y2-O
Occupied
Unoccupied
Closed to Full-Open
Closed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L to
VENTMAX
On
Off
Low
24-v/On
0-v/Off
VENTMIN L to VENTMAX
Closed
On
On
High
24-v/On
24-v/On
VENTMIN H to VENTMAX
Closed
Off
Off
Low
0-v/Off
0-v/Off
VENTMIN L to VENTMAX
Closed
On
Off
Low
0-v/Off
0-v/Off
VENTMIN L to Full-Open
Closed to Full-Open
0-v/Off*
VENTMIN H to Full-Open
Closed to Full-Open
On
*
Y1-O
On
High
DELAY[
24-v/On
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---I
have not been satisfied.
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
516 01 2801 03
Specifications are subject to change without notice.
37
ECONOMIXING
DUAL ENTHALPY
HIGH LIMIT
AVAILABLE
NOT AVAILABLE
TH
AL
M
HU
RA
SINGLE ENTHALPY
)
RH
RA TEMP
PY
(%
P2 (T,RH)
ABSOLUTE HUMIDITY
EN
P1
(T,RH)
ES5
ES4
ES3
ES2
ES1
HL
TEMPERATURE
C12015
Fig. 46 - Single Enthalpy Curve and Boundaries
Table 21 – Single Enthalpy and Dual Enthalpy High Limit Curves (EN Units)
Point P1
Point P2
Enthalpy
Curve
Temp.
Dry---Bulb (_F)
Temp.
Dewpoint (_F)
Enthalpy
(btu/lb/da)
Temp. (_F)
Humidity %RH
Temp. (_F)
Humidity %RH
ES1
80.0
60.0
28.0
80.0
36.8
66.3
80.1
ES2
75.0
57.0
26.0
75.0
39.6
63.3
80.0
ES3
70.0
54.0
24.0
70.0
42.3
59.7
81.4
ES4
65.0
51.0
22.0
65.0
44.8
55.7
84.2
ES5
60.0
48.0
20.0
60.0
46.9
51.3
88.5
HL
86.0
66.0
32.4
86.0
38.9
72.4
80.3
Enthalpy Settings
Two--Speed Fan Operation
When the OA temperature, enthalpy and dew point are
below the respective setpoints, the outdoor air can be used
for economizing. Fig. 46 shows the new single enthalpy
boundaries in the W7220. There are 5 boundaries
(setpoints ES1 through ES5), which are defined by dry
bulb temperature, enthalpy and dew point.
The W7220 controller has the capability to work with a
system using a 2-- speed supply fan. The W7220 does not
control the supply directly but uses the following input
status to determine the speed of the supply fan and
controls the OA damper to the required position.
Refer to Table 21 for ENTH CURVE setpoint values.
The W7220 calculates the enthalpy and dew point using
the OA temperature and humidity input from the OA
enthalpy sensor. When the OA temperature, OA humidity
and OA dew point are all below the selected boundary, the
economizer sets the economizing mode to YES,
economizing is available.
When all of the OA conditions are above the selected
boundary, the conditions are not good to economize and
the mode is set to NO.
Fig. 46 shows the 5 current boundaries. There is also a
high limit boundary for differential enthalpy. The high
limit boundary is ES1 when there are no stages of
mechanical cooling energized and HL (high limit) when a
compressor stage is energized.
Table 21 provides the values for each boundary limit.
38
State
Fan Speed
OCC
Low
Y1
Low
Y2
High
W
High
The W (heating mode) is not controlled by the W7220 but
it requires the status to know where to position the OA
damper for minimum position for the fan speed.
The 2 speed fan delay is available when the system is
programmed for 2 speed fan (in the System Setup menu
item). The 2 speed fan delay is defaulted to 5 minutes and
can be changed in the Advanced Setup menu item. When
the unit has a call for Y1 In and in the free cooling mode
and there is a call for Y2 In, the 2-- speed fan delay starts
and the OA damper will modulate 100% open, the supply
fan should be set to high speed by the unit controller.
Specifications are subject to change without notice.
516 01 2801 03
After the delay one of two actions will happen:
S The Y2 In call will be satisfied with the damper 100%
open and fan on high speed and the call will turn off
OR
S If the call for additional cooling in the space has not
been satisfied then the first stage of mechanical cooling
will be enabled through Y1 Out or Y2 Out.
Checkout
Inspect all wiring connections at the economizer module’s
terminals, and verify compliance with the installation
wiring diagrams.
For checkout, review the Status of each configured
parameter and perform the Checkout tests.
NOTE: See “Interface Overview” on page 28 for
information about menu navigation and use of the keypad.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury, death or property damage.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lock(s) and lockout tag(s). Unit may have more
than one power switch. Ensure electrical service to
rooftop unit agrees with voltage an amperage listed on
the unit rating plate.
If any wiring changes are required, first be sure to
remove power from the economizer module before
starting work. Pay particular attention to verifying the
power connection (24 Vac).
Power Up —
After the W7220 module is mounted and wired, apply
power.
Initial Menu Display —
On initial start up, Honeywell displays on the first line
and Economizer W7220 on the second line. After a brief
pause, the revision of the software appears on the first line
and the second line will be blank.
Power Loss (Outage or Brownout) —
All setpoints and advanced settings are restored* after any
power loss or interruption.
Status —
Use the Status menu (see Table 11) to check the parameter
values for the various devices and sensors configured.
NOTE: See “Interface Overview” on page 28 for
information about menu navigation and use of the keypad.
Checkout Tests —
Use the Checkout menu (on page 32) to test the damper
operation and any configured outputs. Only items that are
configured are shown in the Checkout menu.
* All settings are stored in non--- volatile flash memory.
516 01 2801 03
NOTE: See “Interface Overview” on page 28 for
information about menu navigation and use of the keypad.
To perform a Checkout test:
1. Scroll to the desired test in the Checkout menu using
and
buttons.
the the
2. Press the
button to select the item.
3. RUN? appears.
button to start the test.
4. Press the
5. The unit pauses and then displays IN PROGRESS.
6. When the test is complete, DONE appears.
7. When all desired parameters have been tested, press
(Menu up) button to end the test.
the
The Checkout tests can all be performed at the time of
installation or at any time during the operation of the system
as a test that the system is operable.
!
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Be sure to allow enough time for compressor startup
and shutdown between checkout tests so that you do
not short-- cycle the compressors.
Troubleshooting
Alarms —
The economizer module provides alarm messages that
display on the 2-- line LCD.
NOTE: Upon power up, the module waits 60 minutes
before checking for alarms. This allows time for all the
configured devices (e.g. sensors, actuator) to become
operational. The exception is the SAT sensor which will
alarm immediately.
If one or more alarms are present and there has been no
keypad activity for at least 5 minutes, the Alarms menu
displays and cycles through the active alarms.
You can also navigate to the Alarms menu at any time.
Clearing Alarms —
Once the alarm has been identified and the cause has been
removed (e.g. replaced faulty sensor), the alarm can be
cleared from the display.
To clear an alarm, perform the following:
1.
2.
3.
4.
5.
6.
Navigate to the desired alarm.
button.
Press the
ERASE? displays.
Press the
button.
ALARM ERASED displays.
(Menu up/Exit) button to complete the
Press the
action and return to the previous menu.
NOTE: If the alarm still exists after you clear it, it is
redisplayed within 5 seconds.
Specifications are subject to change without notice.
39
Smoke Detectors
Smoke detectors are available as factory--installed options on
RHH models. Smoke detectors may be specified for Supply
Air only without or with economizer. All components
necessary for operation are factory--provided and mounted.
The unit is factory--configured for immediate smoke detector
shutdown operation; additional wiring or modifications to
unit terminal board may be necessary to complete the unit
and smoke detector configuration to meet project
requirements.
Units equipped with factory--optional Return Air smoke
detectors require a relocation of the sensor module at unit
installation. See Fig. 47 for the as shipped location.
Return Air
Smoke Detector
(as shipped)
Completing Installation of Return Air Smoke Sensor:
1. Unscrew the two screws holding the Return Air
Smoke Detector assembly. See Fig. 48, Step 1. Save
the screws.
2. Turn the assembly 90 degrees and then rotate end to
end. Make sure that the elbow fitting is pointing
down. See Fig. 48, Step 2.
3. Screw the sensor and detector plate into its operating
position using screws from Step 1. See Fig. 48, Step 3.
4. Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan.
Step 11 — Adjust Factory--Installed Options
Smoke Detectors —
Smoke detector(s) will be connected at the Controls
Connections Board, at terminals marked “Smoke
Shutdown”. Remove jumper JMP 3 when ready to
energize unit.
Economizer Occupancy Switch —
Refer to Fig. 49 (on page 41) for general economizer
wiring. External occupancy control is managed through a
connection on the Central Terminal Board.
If external occupancy control is desired, connect a time
clock or remotely controlled switch (closed for Occupied,
open for Unoccupied sequence) at terminals marked
OCCUPANCY on CTB. Remove or cut jumper JMP 2 to
complete the installation.
C12282
Fig. 47 - Return Air Smoke Detector, Shipping Position
Step 1
Step 2
Fig. 48 - Completing Installation of Return Air Smoke Sensor
40
Specifications are subject to change without notice.
Step 3
C12283
516 01 2801 03
Economizer
2 Position Damper
Unit Without Economizer
or 2 Position Damper
Fig. 49 - Wiring for Optional Economizer
C160126
Step 12 — Install Accessories
Step 13 — Check Belt Tension
Available accessories include:
Measure the belt span length as shown in Fig. 50.
Calculate the required deflection by multiplying the belt
span length by 1/64. For example, if the belt span length
is 32 inches: 32 x 1/64 = 1/2 inch deflection.
Roof curb
Thru-- base connection kit (must be installed before unit
is set on curb)
Manual outside air damper
Two-- position motorized outside air damper
Economizer (with control and integrated barometric relief)
Winter start kit
Power exhaust
Outdoor enthalpy sensor
Differential enthalpy sensor
Electric heaters
Single point kits
CO2 sensor
Louvered hail guard
Phase monitor control
Refer to separate installation instructions for information
on installing these accessories.
516 01 2801 03
Belt Force - Deflection Method Check the belt tension with a spring-- force belt force
deflection gauge.
1. Place a straightedge along the belt between the two
pulleys. Measure the distance between the motor shaft
and the blower shaft.
2. Set the tension gauge to the desired tension (see Table 1
in Fig. 50 on page 42). Place the large O--ring at that
point.
3. Press the tension checker downward on the belt until
the large O-- ring is at the bottom of the straightedge.
4. Adjust the belt tension as needed.
Adjust belt tension by loosing the motor mounting plate
front bolts and rear bolt (see Fig. 51) and sliding the plate
towards the fan (to reduce tension) or away from the fan
(to increase tension). Ensure the blower shaft and motor
shaft are parallel to each other (pulleys aligned). Tighten
all bolts securely when finished.
Specifications are subject to change without notice.
41
C160146
Fig. 50 - V-- Belt Force Label
BLOWER PULLEY
V-BELT
MOTOR
PULLEY
MOTOR
MOUNTING
BOLTS (4)
MOTOR MOUNTING
PLATE
Fig. 51 - Belt Drive Motor Mounting
Copyright 2018 International Comfort Products
Lewisburg, TN 37091 USA
42
Specifications are subject to change without notice.
C11504
Replaces: 516 01 2801 02
516 01 2801 03
UNIT START-UP CHECKLIST
(Remove and Store in Job File)
NOTE: To avoid injury to personnel and damage to equipment or property when
completing the procedures listed in this start---up checklist, use good judgement,
follow safe practices, and adhere to the safety considerations/information as
outlined in the preceding sections of this Installation Instructions document.
MODEL NO.:
SERIAL NO.:
I. PRE-START-UP
j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT
j VERIFY INSTALLATION OF OUTDOOR AIR HOOD
j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS
j VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
j CHECK THAT INDOOR-- AIR FILTERS ARE CLEAN AND IN PLACE
j CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE
j VERIFY THAT UNIT IS LEVEL
j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND VERIFY
SETSCREW IS TIGHT
j VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED
j VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION
j VERIFY INSTALLATION OF THERMOSTAT
II. START-UP
COOLING CYCLE ELECTRICAL
SUPPLY VOLTAGE
L1-- L2
L2-- L3
L3-- L1
COMPRESSOR AMPS 1
L1
L2
L3
COMPRESSOR AMPS 2
L1
L2
L3
SUPPLY FAN AMPS
L1
L2
L3
TEMPERATURES
OUTDOOR-- AIR TEMPERATURE
_F DB (DRY BULB)
RETURN-- AIR TEMPERATURE
_F DB
COOLING SUPPLY AIR TEMPERATURE
_F WB (WET BULB)
_F
PRESSURES
REFRIGERANT SUCTION
CIRCUIT A
PSIG
CIRCUIT B
PSIG
REFRIGERANT DISCHARGE CIRCUIT A
PSIG
CIRCUIT B
PSIG
j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
HEATING CYCLE ELECTRICAL
SUPPLY VOLTAGE
L1-- L2
L2-- L3
L3-- L1
COMPRESSOR AMPS 1
L1
L2
L3
COMPRESSOR AMPS 2
L1
L2
L3
SUPPLY FAN AMPS
L1
L2
L3
516 01 2801 03
Specifications are subject to change without notice.
43
TEMPERATURES
OUTDOOR-- AIR TEMPERATURE
_F DB (DRY BULB)
RETURN-- AIR TEMPERATURE
_F DB
HEAT SUPPLY AIR TEMPERATURE
_F WB (WET BULB)
_F
PRESSURES
REFRIGERANT SUCTION
CIRCUIT A
PSIG
CIRCUIT B
PSIG
REFRIGERANT DISCHARGE CIRCUIT A
PSIG
CIRCUIT B
PSIG
j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
GENERAL j ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS (IF EQUIPPED)
j VERIFY SMOKE DETECTOR UNIT SHUTDOWN BY UTILIZING MAGNET TEST
REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS
Copyright 2018 International Comfort Products
Lewisburg, TN 37091 USA
44
Specifications are subject to change without notice.
Replaces: 516 01 2801 02
516 01 2801 03
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