APC | UTS6H | Specifications | APC UTS6H Specifications

APC UTS6H Specifications
®
Hydronic
freewatt Plus
System,
Model
HDJ
INSTALLATION,
OPERATION &
MAINTENANCE
MANUAL
Information and specifications in the manual were in effect at time
of printing of this manual. ECR International reserves the right to
discontinue, change specifications or system design at any time
without notice and without incurring any obligation, whatsoever.
P/N # 240008214, Rev. C [01/2011]
Check our website frequently for updates: www.freewatt.com
www.ecrinternational.com
TABLE OF CONTENTS
1 - Safety Information........................................ 3
Safety Symbols
2 - Introduction ................................................. 4
Manual contains important safety information. Read all
freewatt PLUS System manuals for safety information
and warnings.
3 - Components, Controls and Accessories ...........12
4 - APC Universal Transfer Switch .......................14
5 - Compatible Room Thermostats .....................17
!
6 - freewatt Transfer Switch Model FTS-1.8 ........18
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in death or serious injury
7 - Before installing the system ..........................19
8 - Placing the system.......................................22
! WARNING
9 - Exhaust Gas Leak Sensor .............................29
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
10 - Combustion Air and Vent Pipe ......................31
11 - Gas Supply Piping ......................................33
12 - Electrical Wiring & Connections ....................34
! CAUTION
13 - Commissioning and Startup.........................40
Indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
14 - Maintenance and Cleaning...........................41
15 - Detailed Sequence of Operation ...................43
NOTICE
16 - Troubleshooting .........................................47
Used to address practices not related to personal
injury.
17 - Piping and Wiring Schematics ......................53
Energy Star partner, ECR International has
determined the boiler included as part of
freewatt PLUS System meets Energy Star
guidelines for energy efficiency.
Boiler and HI Module assembly design
certified in US and Canada by Canadian
Standards Association.
Honda MCHP Intertek-ETL Listed,
“Utility Interactive, Cogeneration,
Stationary Engine-Generator Assembly,
Control # 3163904 (US).”
2
1 - SAFETY INFORMATION
1.1 Safety Information
! WARNING
• Check all applicable state, local building codes and
utility company requirements before installation.
Installation shall conform to these requirements in
their entirety. In absence of these codes, use NFPA,
National Gas and National Electric installation codes
and authority having jurisdiction.
Fire, explosion, asphyxiation and electrical shock
hazard. Improper installation could result in death
or serious injury. Read this manual and understand
all requirements before beginning installation.
! WARNING
• Use only with gas approved for system components.
Refer to boiler and MCHP unit rating plates.
Do not install this system in mobile home! Boiler is
not approved for installation in mobile home. Doing
so could cause fire, personal injury or loss of life.
• Provide adequate combustion and ventilation air to
system space as specified in Section 10, “Combustion
Air and Vent Pipe.”
Instructions intended as aid to qualified, service
personnel for proper installation, adjustment and
operation of this system. Read instructions before
attempting installation or operation. Failure to follow
instructions could cause malfunction of system and
result in death, serious bodily injury. Consult qualified
installer, service agency or gas supplier for assistance
or additional information.
• Combustion products shall be discharged outdoors.
Connect system components (boiler and MCHP unit)
to approved vent system only, specified in Section 10,
“Combustion Air and Vent Pipe’.
• Allow system to cool before servicing.
• Shut off electricity and gas supply connected to system
before servicing.
• Never test for gas leaks with open flame. Use
commercially available soap solution specifically made
for detection of leaks to check all connections. See
Section 11, ‘Gas Supply Piping’.
! WARNING
Do not store or use gasoline or other flammable
vapors and liquids, or other combustible materials in
vicinity of this or any other appliance.
• Verify natural gas input rate is correct. Over firing
may result in early failure of the boiler’s components.
Under firing may result in too much air for combustion
process causing poor or loss of combustion.
Natural gas and propane are normally odorized
by fuel supplier. Odorant may not be perceivable.
Installation of UL and CUL recognized fuel gas
detectors installed in accordance with manufacturer’s
instructions is recommended as additional safety.
• Install boiler to operate within its intended temperature
range. See boiler ‘Installation Operation & Maintenance’
manual.
Exhaust gases from boiler contain chemicals which
may include carbon monoxide (CO). Carbon
monoxide is odorless, tasteless, clear colorless
gas, which is highly toxic. Even low concentrations
are suspected of causing birth defects and other
reproductive harm.
• Follow regular service and maintenance schedule for
efficient and safe operation.
• Keep system area clean of debris and free from
combustible and flammable materials.
• System is not intended for temporary heating of
buildings under construction.
NOTICE
• System is not do-it-yourself project. Install and service
by qualified professionals only.
UL and ULC recognized CO detectors are required
for all buildings equipped with ECR freewatt PLUS
System. All CO detectors should be installed in
accordance with manufacturer’s instructions and
applicable local building codes.
NOTICE
Installation Requirements Specific To The State Of
Massachusetts, boiler installation must conform to
Commonwealth of Massachusetts code 248 CMR
which includes but is not limited to: Installation by
licensed plumber or gas fitter.
3
2- INTRODUCTION
2.1 Hydronic freewatt PLUS system is gas-fired micro-
2.2 Application Notes
combined heat and power (micro-CHP) system suitable for
residential and light commercial space and water heating
applications up to 200,000 Btu/hr.
• Maximum design water temperature of 160°F. Heat
emitters sized for heat output using maximum
design water temperature of 160°F. Heat loss
calculations based on approved industry methods and
outdoor temperature corresponding to design water
temperature appropriate for local area’s weather.
• freewatt PLUS System consists of these main
components:
• high efficiency (condensing) boiler
• zone control relays
• Hydronic freewatt PLUS System may be applied to
normal variety of heating loads served by conventional,
multi-zone hydronic heating systems.
• base-board radiation,
• radiant floor heating,
• domestic hot water via indirect storage tank,
• powered convective heaters,
• hydro-air handlers*
• heat rejection system
NOTE: *Application limited to specific air handler models.
• control module
• hydronic hybrid integration (HI) module
• HONDA MCHP unit
• freewatt transfer switch
• electrical load distribution and management
panel
• freewatt high efficiency boiler Model FW95M certified
as Category IV direct vent central heating boiler with
combustion air supplied directly from outdoors through
special air intake system. Combustion products of
freewatt Boiler are exhausted to outdoors through
direct vent system.
• Hydronic freewatt PLUS Systems use circulators
or valves for individual zone temperature control.
Configuration of hydronic distribution system must be
in form shown in this manual with respect to overall
arrangement of freewatt PLUS Boiler and MCHP unit
with respect to zone loads.
• See specific piping schematics provided for systems
zoned with circulators and valves and for systems using
air handlers.
• Hydronic hybrid integration (HI) module and control
module integrate freewatt Boiler and HONDA MCHP
unit into hydronic heating circuit of building.
• HONDA MCHP unit, Model MCHP1.2 D & DP, is
manufactured by HONDA Corporation for use with
freewatt PLUS System.
• freewatt Control Module is common to all applications
of hydronic freewatt PLUS System. Different ECR zone
pump/valve relay controls required for use with pump and
valve-zoned systems and hydro-air systems.
• Appropriate pump/valve relay control from ECR
family of zone controls must be used as supplied with
freewatt PLUS System.
• See specific electrical wiring diagrams provide for
circulator zoned systems, valve zone systems, and
systems with air handlers.
• Produces electrical power while also generating heat
in response to building’s normal thermostatic heat
demand. The
• Produces 240VAC power delivered to main circuit
panel through 240VAC dedicated circuit.
• Certified under UL 2200 - Stationary Generators
and UL 1741 - Inverters, Converters, Controllers
and Interconnection System Equipment for Use With
Distributed Energy Resources.
• Do not use anti-freeze solution in freewatt PLUS System
hydronic flow loop. Use only good quality water. Install
heat exchanger to isolate anti-freeze solution from main
hydronic system, if particular zone requires anti-freeze
protection.
• HONDA MCHP unit utilizes indoor air for combustion
and vents combustion products to outdoors with
PVC pipe. Honda MCHP unit is non-direct vent
appliance.
• Priority domestic hot water heating is available and must be
properly selected in setup of Control Module and ECR zone
controls.
• Indirect water heater aquastat setting must be between
120 to 125°F.
• Mixing valve must be used on domestic water supply
outlet of any indirect water heating tank applied with
freewatt PLUS. Do not use set back.
For additional details on system components refer to
section 3.
4
2- INTRODUCTION
• Installation of UL and ULC recognized CO detectors with
audible alarms (not supplied with system) are required
part of freewatt PLUS installation. freewatt PLUS
Exhaust Gas Detection System included part of freewatt
PLUS System does not provide audible alarm for protection of building inhabitants from potentially dangerous high
levels of carbon monoxide. Install both Exhaust Gas Detection System and separate, independent UL recognized CO
Detectors.
! WARNING
Burn and scald hazard. Failure to install mixing
valve will result in hot water scalding hazard.
Install mixing valve per manufacturer instructions.
• Hydronic system is supplied with freewatt communicating
thermostat. Utilize thermostat on single “Smart Zone” only.
Select “Smart Zone” as zone with largest heating demand
(not domestic hot water zone) typically the largest space
heating zone on first floor of two story home. freewatt
PLUS System will produce best electric power generation
benefit if Smart Zone represents at least 25% of total home
heating load. Consider combining zones to achieve desired
heat load for Smart Zone if there is no single large zone in
existing distribution system, but many small zones.
• Installation of two different outdoor temperature sensors is
required for proper operation of hydronic freewatt PLUS
System, both are supplied. One (Honeywell) connects
directly to boiler and other (Tekmar) to freewatt Control
Module.
• hydronic freewatt PLUS System will generate heat &
electric power during power outage if installed and commissioned per Installation, Operation, and Maintenance Manual.
Heating system must be connected to APC UTS.
• freewatt communicating thermostat is directly wired to
freewatt Control Module circuit board. Additional five
zones, with compatible conventional heating thermostats
(new or existing) may be connected directly to freewatt
Control Module circuit board. If more than compatible six
zones (including priority domestic hot water and Smart
Zone) are needed freewatt PLUS System can be
expanded to include additional heating zones. Additional
ECR zone controls may be required.
• Installation, setup, commissioning and maintenance of
freewatt PLUS System requires use of freewatt
PLUS MINT software tool loaded on laptop computer running Windows XP or Vista with working serial connection.
• Call freewatt PLUS Technical Support Line for freewatt PLUS System installations above 3,300 feet and for
additional information.
• Hydronic freewatt PLUS System installation may be
phased. Install freewatt PLUS Boiler and Control Module
in required piping configuration as shown in Section 17,
leaving installation, commissioning, and operation of MCHP
to later date (cap off piping connections to MCHP), if need
to supply heat to building quickly as possible. freewatt
PLUS boiler will provide sufficient heating capacity to meet
normal loads if MCHP unit is not available for operation.
• Heat rejection kit (sold separately) required for installation.
• Water cooled heat rejection kit used when there
is uninterruptable supply of water during power
outage. Kit ties into main water supply line and
discharges water to appropriate drain.
• Air cooled heat rejection kit used when there is
not uninterruptable supply of water during outage
(houses with well pumps). Air cooled heat rejection
system is vertically arranged side discharge fan-coil
unit with closed coolant loop designed for outdoor
installation.
• MCHP unit will provide significant portion of annual
heating energy needed in home, MCHP unit alone
cannot be expected to meet all desired comfort and/or
freeze protection needs. Maintaining operation status of
freewatt Boiler as part of freewatt PLUS System is
essential to meeting all comfort and/or freeze protection
needs.
• Zone Valves with their own 24 VAC power supply may
be used on zones 3-6. Refer to Electrical Wiring and
Connections section for detailed information on use of
steering relays in freewatt control module.
• “CHP MODE” switch OFF position conveniently
separates and maintains boiler heating function while
disabling operation of MCHP unit and generation of
electric power. This is Bypass Mode of operation.
• Full heating operation of hydronic freewatt PLUS System
is not dependent on maintaining working connection to
Internet. Lack of internet connection will prevent remote
communication with system by homeowner or service
provider.
5
2- INTRODUCTION
2.3 Save These Instructions
Read this manual carefully and keep for future reference by
service technician. Manual is considered permanent part of
your Hydronic freewatt PLUS System and should remain
with system.
Manufacturer is not responsible for any field installation
changes made to system installation that are not described
or acknowledged in this manual.
Product must be installed by licensed plumber or gas fitter
when installed within Commonwealth of Massachusetts.
Appliance has been equipped for residential installations.
If used for commercial applications, all code requirements
must be adhered to for installation. May require additional
controls or system components.
2.4 Read All Documents
• Hydronic freewatt PLUS (Model HDJ) User’s
Information Manual.
• freewatt FW95M-200 Boiler Installation, Installation,
Operation and Maintenance Manual, Parameter Guide,
Control Manual & Troubleshooting Guide.
• HONDA MCHP, Model1.2D and MCHP1.2DP, Type UCFJ,
Installation Manual and Owner’s Manual.
• HAI Thermostat Installation Instructions and Owner’s
Manual
• Applicable ECR Zone Control Manual
• freewatt Indirect Water Heater Set-up, Operating &
Maintenance Instruction Manual
• freewatt Transfer Switch Installation, Operation and
Maintenance Manual.
• APC Universal Transfer Switch Site Preparation and
Installation Guide.
• Hydronic freewatt (model HDJ) Control Module
Installation, Operation and Maintenance Manual.
6
2- INTRODUCTION
Figure 2-1 - freewatt PLUS System Components ( Zoned with Circulators)
From DHW
freewatt® PLUS System Components
To HI Module
Heating Zone Returns
From HI Module
To Boiler
freewatt System Control Module
From Boiler
Zone Controls
Heating Zone
Circulators
APC UTS6H
Honda MCHP Exhaust Gas Sensor
Programmable & Communicating HAI
Thermosat
freewatt Outdoor Temperature
Sensor
DHW Circulator
Boiler Outdoor Temperature Sensor
freewatt Transfer
Switch W/Load
Balancing Transformer
HI Module
Honda MCHP
freewatt Indirect
Hot Water Heater
freewatt Boiler
95% AFUE
Figure 2 -2 freewatt PLUS Boiler
7
2- INTRODUCTION
Table 2-1 System Rating and Sizing
Unit
Honda
MCHP Unit
(0 - 3,300’)
MCHP Mode
Backup Mode
Boost Mode
Input
(MBH)
Heating
Capacity
(MBH)
Overall
Efficiency
(%)
Nominal
Power
(kWe)
Weight
(lbs)
18.4
12.3
12.3
1.2
180
18.5 - 26
12 - 17
12 - 17
0 - 1.8
180
26
17
17
1.8
180
80-200
76-190
95%
-
284
Boiler
Boiler Module (0 - 2,000’)
Ratings are for sea level applications.
Boiler: Consult boiler Installation, Operation and Maintenance Manual for high altitude conversion and derating
instructions.
Honda MCHP: Consult with ECR International Technical Support for high altitude conversion and derating instructions
Boiler manual has I=B=R Net Rating (MBH) data for system design.
Proper application of Hydronic freewatt PLUS System requires assessment of heat loss and applied building needs.
Relatively lower heat output of MCHP unit, priority heating device, and automatic modulation of firing rate of condensing
boiler allows Hydronic freewatt PLUS System to be applied to wide range of loads without efficiency penalty. System
performance depends significantly on sizing of heat distribution system relative to actual space heating demands.
Under-radiated distribution systems that require high system water temperatures (above 180°F during design (coldest)
day outdoor temperature conditions) will significantly compromise electric generation performance of freewatt PLUS
System. Recommend hydronic heating system be designed for 160°F or lower water temperature to produce greatest
annual electrical power generation and highest energy efficiency. 160°F design water temperature may require
installation of new radiation or re-configuration of existing radiation to acceptably heat zones.
Hydronic freewatt PLUS System operates with two levels of heat: HONDA MCHP’s thermal output delivering low heat
and boiler delivering high heat. freewatt PLUS uses proprietary heating algorithm to ensure long MCHP operating
hours will maximize system’s electrical power production. Boiler will fire to provide heat if additional heat is needed or
anticipated.
Boiler will automatically modulate in range of 80,000 to 200,000 BTU/hour, and MCHP unit will continue to run to
provide needed level of heat supply in high heat mode. Hydronic freewatt PLUS System operates with automatic and
programmable outdoor temperature reset of hydronic system water temperature to provide uniform heating.
8
2- INTRODUCTION
Figure 2-3 MCHP & Hydronic Hybrid Integration
Module
Figure 2-4b Hydronic Hybrid Integration Module
Figure 2-4a Hydronic Hybrid Integration Module
Figure 2-5 Typical freewatt PLUS Control
Module Configuration
9
2- INTRODUCTION
Figure 2-6 freewatt PLUS Control Module Details
Figure 2-7 MCHP Dimensions
System Clearances to Combustibles
Dimensions
Boiler
Honda MCHP
Top
1" ( 8" for service)
14"
Sides
1" (24" for service)
0.4" (12" for service)
Base
See Note 1
See Note 2
Front
0" (24" for service)
0.4" (20" for service)
Rear
6"
0.4" (2" for service)
Intake/Vent Piping
0"
0"
Near Boiler HW Piping
1"
0"
NOTE: 1. Combustible floor approved, but not carpet.
2. MCHP attached to base anchored to concrete floor.
10
2- INTRODUCTION
Figure 2-8 MCHP Electrical Connection Details
Figure 2-9 MCHP Front Interface Details
11
3 - COMPONENTS, CONTROLS AND ACCESSORIES
Section provides brief description of components,
controls, and accessories of hydronic freewatt PLUS
System.
3.4 HONDA MCHP Unit
• Honda MCHP Unit is custom-engineered microcombined heat and power module integrated into
Hydronic freewatt PLUS System. MCHP unit
designed to start and stop by means of digital signal
from control module when control module senses
there is heat demand in dwelling.
3.1 Boiler
Refer to separate freewatt boiler documentation for
detailed information on the freewatt boiler.
• MCHP unit is ETL certified for grid interconnection
if your utility allows, unit can deliver electrical
power back into electric grid. Unit provides system
operating data and diagnostic data to control
module.
3.2 freewatt Control Module
• freewatt control module monitors and controls
operation of Hydronic freewatt PLUS System.
Sensing inside and outside temperature as well as
other system temperatures and settings, proprietary
heating algorithm controls operation of Honda
MCHP optimizing power production and low level
heat delivery.
3.5 Smart Zone Communicating Thermostat
• Smart zone communicating HAI thermostat
communicates directly with control module. Allows
freewatt control module to download thermostat
settings and maximize system’s electrical power
generation, providing higher level of comfort to
dwelling.
• freewatt control module includes relay/interconnect
board, DC power supply, and advanced singleboard computer board incorporating powerful
microprocessor, RS-232/RS-485 serial ports, and
10/100 Base-T Ethernet port.
• Zone which thermostat is applied is referred to as
“Smart Zone”. Supplied communicating thermostat
must be used on one space heating zone of hydronic
system. freewatt PLUS System will not work with
any other thermostat installed in “Smart Zone”.
Compatible conventional thermostats, may be used
in other zones.
3.3 freewatt PLUS Hydronic Hybrid Integration
(HI) Module
• freewatt PLUS Hydronic HI Module location is
where heat in MCHP coolant is transferred into
hydronic water.
• freewatt PLUS Hydronic HI module consists of
brazed plate heat exchanger, mixing valve, coolant
reservoir and coolant pump.
3.6 Outdoor Temperature Sensor
• Hydronic freewatt PLUS System uses two outdoor
temperature sensors to anticipate heat demand
within dwelling by tracking outdoor temperature.
Control module will determine optimum temperature
to activate Honda MCHP unit and provide thermal
comfort, maximizing generation of electrical power
as outdoor temperature falls.
• Hydronic water is pumped through secondary circuit,
MCHP coolant is pumped through primary circuit.
• Mixing valve is field adjusted to deliver minimum
152°F coolant to pump, which returns coolant to
Honda MCHP unit.
• Coolant reservoir holds spare coolant and is
instrumental in proper commissioning of system.
• Honeywell temperature sensor is connected directly
to freewatt PLUS Boiler and Tekmar temperature
sensor is connected directly to freewatt Control
Module.
• Hydronic HI Module designed to mount on
adjacent wall or on side of boiler. Module’s brazed
plate heat exchanger has two ¾” NPT hydronic
water connections and two ¾” NPT coolant loop
connections connected to HI module
• Both sensors are required for proper operation.
Route in separate cables at least on foot apart to
ensure signal quality.
• Hydronic water circulator for HI module is mounted
external to HI module as part of hydronic system
piping.
3.7 Internet Connection
• freewatt control module operates both HI module
coolant pump and hydronic circulator suppling
hydronic water flow to HI module. Coolant pump
operates on 24VDC supplied directly by freewatt
control module. Associated 120VDC hydronic
circulator is powered through ECR AR822-II relay
control.
Connecting control module to high-speed internet
service allows freewatt PLUS service provider to
monitor system’s operating characteristics. freewatt
control module will notify service provider of
abnormality, if system has operating characteristics
outside normal operating range and remote monitoring
system is enabled and active.
12
3 - COMPONENTS, CONTROLS AND ACCESSORIES
• Installations without uninterrupted supply of water
during power outage (most houses with well pumps)
air cooled heat rejection system is available.
Contains vertically arranged side discharge fan-coil
unit installed outside, and is connected to HI Module
through closed coolant loop. Dimensions of unit are
24” Length, 15” Width, and 36” Height.
3.8 Website
freewatt control module web site address is assigned
to system at time of installation allowing homeowner
and service provider to monitor or control system’s
operation.
3.9 External Condensate Pump
• Air cooled heat rejection system installer must
supply secure mounting pad or foundation, power
wiring, low voltage wiring (18 AWG minimum),
and closed Propylene Glycol coolant loop from
HI Module to unit (3/4” piping, circulator, air
separator, pressure relief valve, expansion tank,
flow check, and purge valve). See FWHRJ Air
cooled heat rejection system Installation, Operation,
Maintenance manual for specific installation
instructions.
• Float activated condensate pump with integral
sump is required for installation where there is no
floor drain or other appropriate drainage receptacle
available to receive condensate from system (boiler
and MCHP unit).
• Condensate pump can be piped to remote point to
sanitary sewer system (Please follow all state or local
regulations regarding disposal of condensate). Install
system so proper pitch can be placed on piping to
deliver condensate safely to external condensate sump.
3.13 Display/User Interface
Homeowner can scroll through control settings and
change operating settings to customize freewatt PLUS
System operation using PC.
3.10 Exhaust Gas Leak Sensor
• Exhaust Gas Leak Sensor (EGLS) monitors integrity of
Honda MCHP unit combustion system and shuts down
MCHP unit if certain potentially unsafe conditions are
detected.
3.14 Internet Connection & Commissioning
• freewatt System control module connects to
customer’s home network in same way any
computer or other network appliance does
connecting via Ethernet connection available on
most routers. freewatt PLUS connection uses
10/100 Mbit/s wired Ethernet connection, wireless
bridges may be used when wired connection isn’t
possible.
• Monitors carbon monoxide level in air space near MCHP
unit.
• Exhaust Gas Leak Sensor is independent and separate
from audible CO alarming system installed with
freewatt PLUS System in compliance with best
practices for all fuel-fired central heating equipment.
• Proper installation of the EGLS is required to
commission Hydronic freewatt PLUS System.
• freewatt control module is assigned static address
outside of DHCP range available from router.
3.11 Concentric Vent/Air Intake Termination
(Optional)
• IP address, netmask, gateway and DNS addresses
are programmed into control module using
freewatt PLUS service tool. Common configuration
(with router at address 192.168.1.1) would have
freewatt address set to 192.168.1.200, netmask
set to 255.255.255.0, gateway set to 192.168.1.1
and DNS entries set to 208.67.222.222 and
208.67.220.220 (addresses for Open DNS).
• Optional concentric vent/air intake termination utilizes
single opening for boiler through wall or roof of
structure.
• MCHP unit requires use of exhaust vent.
3.12 Heat Rejection System
• Router configured to allow incoming traffic for
diagnostics and (if requested by customer) access
to user web page. Routers refer to these settings as
‘port forwarding’, ‘applications’’, or ‘virtual servers’.
Refer to router manufacturer’s documentation.
Heat rejection kit (sold separately) is required for backup
mode operation during times when no space heating or
water heating is required.
• A water cooled heat rejection system is available
for installations where there is uninterrupted supply
of water during power outage (city water). Kit ties
into main water supply line and discharges water to
appropriate drain. Drain must be suitable for 0.35 GPM
at 180° F. Kit contains ball valve, pressure reducer,
electronic ball valve, and flow reducer. Installer must
supply piping to tie into main water line, and deliver
water to appropriate drain.
• Remote diagnostics require port 4500 be directed
to freewatt control module. Port for customer web
pages is configurable - usually set to 8082 because
many ISPs (Internet Service Provider) block use of
standard port 80.
13
• Number of wireless bridge or gaming bridges
have been tested to work with control module if
wireless configuration is required. Configure using
manufacturer’s instructions.
4 -APC UNIVERSAL TRANSFER SWITCH CONFIGURATION
Circuit 5 & 6
• Although all UTS circuits do not need to be used,
Circuits 5 & 6 must be connected to main circuit panel
and must receive power for UTS to function. Circuits
5 & 6 must also be connected to circuits that are in
opposite phases, so 240V is present across two circuits.
Allows UTS6H to monitor Utility power supply.
NOTICE
APC universal transfer switch is provided for use
with freewatt Plus system and is not intended
for emergency backup power applications.
Manufacturer is not responsible for the use of this
switch in any manner not outlined in this manual or
APC UTS6H Installation Guide.
4.1
4.2
Uninterruptible Power Supply (UPS)
• If using UPS to power “uninterruptable” loads, plug UPS
power input cord into convenience outlet to charge UPS
batteries when MCHP Backup Power is available. Note,
UPS batteries will also be charged from convenience
outlet when grid power is available.
APC Universal Transfer Switch
• freewatt PLUS System incorporates APC Universal
Transfer Switch as load panel in Back-Up Power Mode.
• UTS6H requires customized configuration in order
to operate effectively with freewatt PLUS System.
Following section will explain configuration process for
this component.
• Follow UPS and UTS6H instructions for sizing UPS for
loads configured to be powered by UPS in Backup
Mode. Typically, low power circuits, such as computers
or security systems, are configured for use with UPS.
• Set-up for APC Universal Transfer Switch (UTS6H)
involves following System Configuration and Setup
section in UTS’s Installation Guide.
4.3
• Important notes about this product:
Non-Delayable & Delayable Circuits
• Circuit assigned to freewatt boiler shown in examples
on Circuit 3 must be configured as “Delayable-No” to
ensure freewatt PLUS System always has power
when in Backup Mode, otherwise system may not
operate correctly.
! WARNING
Improper configuration may result in improper
operation of freewatt PLUS System in Backup Power
Mode. Failure to follow these instructions could cause
malfunction of system and result in death, or serious
bodily injury. Read and follow these instructions
before attempting installation, commissioning or
operation.
• All other circuits must be configured as “DelayableYes” except in case of example where UPS is used
and circuit source is configured as “UPS” or “Uninterruptable”.
NOTICE
4.4
Use only outlet mounted AFCI and GFCI circuit
interrupters with the UTS. Do not connect the UTS
to circuits utilizing AFCI or GFCI circuit breakers in
the main electrical panel.
Hardwire Kit
• UTS6H is supplied with Hardwire Kit used to connect
freewatt PLUS Transfer Switch to UTS6H. See
Parts, Kits & Optional Accessories for kit part number.
Hard-wire kit is installed in UTS6H and accepts cable
delivering Honda generator’s backup power output.
Follow electrical schematics in this manual and
instructions in Hard-wire Kit for installation.
Circuit 1
• Circuit 1 includes Load attached to Circuit-labeled “1”
and convenience outlet on front of UTS6H, together
must consume less than 15 amps when system is
operating in Backup Mode. If not using Uninterruptable
Power Supply (UPS), it is recommended to use circuit
1 to power freewatt PLUS System’s low power
condensate pump.
NOTICE
Circuits 5 & 6 must be connected to circuits in
opposite phases to ensure 240VAC is present across
two circuits, to allow UTS6H to monitor utility power
supply and sense power outage.
• Circuit 1 is only powered by MCHP when in Backup
Power Mode. It will not be powered from UPS if
UTS6H is equipped and configured to use UPS. It
is recommended that UPS be plugged into front
convenience outlet and therefore is powered by Circuit
1.
NOTICE
Mark all breakers in Electric Panel as moved to
UTS6H for future reference.
14
4 - APC UNIVERSAL TRANSFER SWITCH CONFIGURATION
Table 4-1 Typical UTS6H Circuit Setup without UPS
Typical UTS Circuit Setup without UPS
CIRCUIT
I
CIRCUIT
2
CIRCUIT
3
CIRCUIT
4
CIRCUIT
5
CIRCUIT
6
Other (condensate
pump)
Sump
pump
Boiler
Computer
Security
System
Refrigerator
Source
GEN
GEN
GEN
GEN
GEN
GEN
Delayable
Yes
Yes (1)
No
Yes
Yes
Yes
Max time off (min)
30
1
30
5
60
30
Min time on (min)
30
2
30
5
60
15
Security Mode
Off
Off
Off
Off
Off
Off
Amp Rating(A)
15
15
15
15
15
15
PARAMETER
Load Type
Note (1)
Delayable - Yes: Setting is required for Warm Air freewatt PLUS System boiler to prevent freewatt PLUS System
or sump pump from losing power when in Backup Mode. If sump pump and boiler may operate at same time (power outages during heating season and heavy rain events), possible solutions include:
A. Battery-backed sump pump
B. UPS and configure sump pump power source as “Either” UPS or Generator.
Table 4-2 Typical UTS6H System Setup without UPS
Typical UTS6H System Setup without UPS
Bypass mode
No
Load shedding?
On
Voltage sensitivity
Medium
Time Management
On
Reset Energy Meter
No
System Test
No
Backup1 Source Type
Generator
GEN power rating
1700 (1)
GEN SRGE Overload Time
0 seconds
GEN Start Mode
manual
Backup2 Source Type
none
GEN power rating
1800
GEN SRGE Overload Time
Reset to default
0 seconds
no
NOTE:
(1) Available generator power is set to 1,700 watts to account for 100 watt power consumption of load balancing
transformer.
15
4 - APC UNIVERSAL TRANSFER SWITCH CONFIGURATION
Table 4-3 Typical UTS6H Circuit Setup with UPS
Typical UTS Circuit Setup with UPS
CIRCUIT
I
CIRCUIT
2
CIRCUIT
3
CIRCUIT
4
CIRCUIT
5
CIRCUIT
6
Other (condensate
pump)
Sump
pump
Boiler
Computer
Security
System
Refrigerator
Source
GEN
EITHER
GEN
EITHER
EITHER
GEN
Delayable
Yes
Yes
No
Yes
Yes
Yes
Max time off (min)
30
1
30
5
60
30
Min time on (min)
30
2
30
5
60
15
Security Mode
Off
Off
Off
Off
Off
Off
Amp Rating(A)
15
15
15
15
15
15
PARAMETER
Load Type
Note: UPS power output cord shall be attached to “UPS” inlet port of the UTS6H.
Table 4-4 - Typical UTS6H System Setup with UPS
Typical UTS6H System Setup with UPS
Bypass mode
No
Load shedding?
On
Voltage sensitivity
Medium
Time Management
On
Reset Energy Meter
No
System Test
No
Backup1 Source Type
Generator (1)
GEN power rating
1700 (2)
GEN SRGE Overload Time
0 seconds
GEN Start Mode
manual
Backup2 Source Type
UPS (3)
GEN power rating
2100 (4)
GEN SRGE Overload Time
0 seconds
Reset to default
no
Notes:
1. Generator: Corresponds to 240VAC GEN port on UTS6H.
2. GEN Power Rating (Backup1): Set to 1,700 watts to account for 100 watt power consumption of load
balancing transformer.
3. UPS: Corresponds to UPS inlet port on UTS6H.
4. GEN Power Rating (Backup2): Corresponds to 1,700 watts of MCHP power PLUS UPS power rating (in this
case 400 watts).
16
5 - COMPATIBLE ROOM THERMOSTATS
5.1 freewatt Hydronic Zone Thermostat
Requirements:
Select heat or heat/cool thermostat with following
properties, except Zone-2. Zone 2 must use HAI Smart
Zone Thermostat.
• Use isolated relay contacts to switch W call for heat
signal. freewatt expects 24VAC “HOT” connected
to thermostat’s “R” terminal to pass directly thru
thermostat’s W relay to drive “W” signal back with
minimal loss of signal voltage when calling for heat.
• Voltage must be greater than 20 Volts AC, when
thermostat calls for heat. Thermostat is not suitable
for use with freewatt PLUS System if voltage is
less than 20 Volts AC.
5.5 Communication Registers On RC-1000 Smart
Zone Thermostat:
• Apply factory reset to restore communications on RC1000-WH-ECR. Press (“click”) on scroll wheel to start.
• Select “Setup”.
• Thermostat’s W relay must present high-impedance
(ie. no current flow) when open, not calling for heat.
• Select “Installation Settings”.
• Notice warning for installers. Press “Continue”.
• Thermostat must not add resistive elements to W
signal path (resistors, voltage divider networks,
MOSFET(s), transistors, etc.) when not calling for
heat. Open circuit impedance of W signal path must
be greater than 100,000 ohms, and preferably higher
(ie 1 Megohms or more).
• Select “Factory Reset” (last item in list).
• Press “Back” as required to return to normal operation.
All settings, including setback programming have been
cleared.
5.2 Known Problematic Thermostats:
• Honeywell T87N, T87K
5.3 Known Compatible thermostats:
• HAI Omnistat1, Onmistat2
• LUX 1500
• Braeburn Model 3000
5.4 Tests For Thermostat Compatibility:
• Resistance test:
• Thermostat calling for heat, W relay closed:
Thermostat relay impedance must be less than 40
ohms when measured across thermostat R and
W terminals. Impedance greater that 40 ohms
is unacceptable and will not work reliably with
freewatt PLUS System.
• Thermostat not calling for heat, W relay open:
Thermostat relay impedance should be greater than
1 Megohm (1 million ohms).
• Voltage test:
• AC voltage measured between 24V common
terminal on circuit board J02 connector (labeled
24VAC - bottom of board) and circuit board J02 W1,
W3 or W4 terminals (top of board) must be less
than 1.5 Volts AC when no call for heat, attached to
freewatt PLUS System and powered by 24 to 28
volts AC from freewatt Control Module. Thermostat
not suitable for use with freewatt PLUS System if
voltage is greater than 1.5 Volts AC.
17
6 - freewatt TRANSFER SWITCH MODEL FTS-1.8
6.1 freewatt Transfer Switch Model FTS-1.8
• freewatt Transfer Switch provides freewatt PLUS
product line with reliable means of providing backpower to critical loads while preventing electrical
feedback to utility from MCHP.
• freewatt Transfer Switch is specifically designed for
use with freewatt PLUS micro-combined heat and
power (micro-CHP) system.
• freewatt PLUS provides backup power up to 1.8 kW
and is limited in type, wattage, and number of loads
supported.
• freewatt Transfer Switch provides automatic transfer
of electric load from utility power source to MCHP unit.
No manual adjustments or switching are required by
homeowner under normal operation.
• freewatt Transfer Switch certified for use as part of
freewatt PLUS System. Only install with freewatt
PLUS System by qualified installer.
• freewatt System Control Module and freewatt
Transfer Switch monitor utility power source for failure.
• Consult freewatt Transfer Switch Installation,
Operation, and Maintenance manual for installation,
operating and troubleshooting information.
• Monitor HONDA MCHP power source for electrical power
output and proper operating conditions.
Figure 6-1 freewatt Transfer Switch
18
7 - BEFORE INSTALLING THE SYSTEM
7.1 Codes
7.2 System Sizing And Application
See boiler manual for information pertaining to installation
in State of Massachusetts.
• Select system with proper capacity before continuing
installation. Firing rate of system should be greater
than or equal to calculated peak heating load (heat
loss) for building or area(s) served by system. See
Section 2 for system ratings.
System incorporates gas-fired, direct vent, condensing
appliances and must be installed in accordance with the
following:
• Base heat loss calculations on approved industry
methods.
Fuel Gas:
• United States: Installation shall conform to National
Fuel Gas Code (NFPA-54/ANSI Z223.1).
• Configure hydronic freewatt PLUS System with Zone
2 operated by Smart Zone HAI thermostat supplied
with freewatt PLUS System. Zone 2, Smart Zone,
must have sufficient thermal load to provide proper
operation of MCHP unit. Too small of heat load in
Smart Zone will result in frequent MCHP cycling and
poor electrical power savings. The “Smart Zone” should
be selected as zone with largest heating demand (but
not domestic hot water zone). Normally, this would
be largest space heating zone on first floor of two
story home. freewatt PLUS System will produce
best electric power generation benefit if Smart Zone
represents about 25% of total home heating load.
Consider combining zones to achieve desired heat
load for Smart Zone if there is no single large zone in
existing distribution system but many small zones.
• Canada: Installation shall be in accordance with CSAB149.1 and B149.2 installation codes.
• Authority having jurisdiction
Electrical:
• United States: National Electrical Code (ANSI/NFPA70).
• Canada: CAN/CSA-C22.1 Canadian Electrical Code.
• Authority having jurisdiction
Condensate Disposal:
• Authority having jurisdiction
Installers:
• freewatt PLUS System must be applied with hydronic
heating systems having ample heat delivery capacity
relative to maximum or design heat load. This is
requirement for freewatt PLUS and all highefficiency hydronic systems to achieve maximum
energy efficiency. “Under-radiated” system requiring
high supply water temperature (above 180°F) during
outdoor low-temperature design conditions will result
in reduced contribution of MCHP to total heat delivery,
reducing electrical power production benefit. Preferred
design operating temperature is 160°F. Consider
adding additional heat radiation to existing underradiated distribution systems for proper application of
freewatt PLUS.
• Authority having jurisdiction
• Follow recommended maintenance outlined in this
manual.
Grid Interconnection:
• Authority having jurisdiction with respect to
interconnecting to grid.
• Power generation performance of freewatt PLUS
System may be adversely affected if there is any zone
resulting in constant active call for heat during heating
season (i.e., highly under-radiated zone). Verify all
zones have enough radiation, even during very cold
weather, so no zone thermostat will produce continuous
call for heat (i.e., cannot be satisfied).
• freewatt PLUS requires different ECR zone relay
controls depending on type of zoning utilized: zoned
by circulators, valves, or air handlers. Verify you
have correct ECR zone relay control before beginning
installation.
19
7 -BEFORE INSTALLING THE SYSTEM
• Advise owner to keep venting and combustion air
intake passageways free of obstructions. Both venting
and combustion air intake piping systems connected
to outdoors must permit flow through piping systems
without restrictions for system to operate.
7.3 Considerations for System Location
Before selecting location for system, following should
be considered. Each system component considered for
installation must be:
• Supplied with correct type of gas.
• Install control module and switching components to
protect from water (dripping, spraying, rain, etc.)
during operation and service (pump replacement, MCHP
maintenance, etc.).
• Connected to separate (two) combustion gas vent
pipes discharging to outdoors: one for freewatt PLUS
Boiler unit and one for MCHP unit. Each vent must
meet minimum and maximum vent lengths for each
unit. (See Section 10).
• Locate system where ambient room temperatures
(minimum possible temperatures where system is
installed assuming system is not in operation and
therefore contributes no heat to space) are at or above
32°F to prevent freezing of liquid condensate.
• Connected to suitable combustion air intake piping
system to supply fresh (outdoor) air for combustion (3”
for freewatt PLUS Boiler) (not required for MCHP)
(See Section 10)
• Connected to suitable forced hot water distribution
system.
7.5 Combustion Air and Vent Pipe
Requirements
• Supplied with suitable 120VAC electrical supply for
all system motors and controls and separate 240VAC
supply for MCHP unit.
• System requires dedicated direct vent system for boiler
and separate vent for HONDA MCHP to discharge all
combustion products to outside atmosphere.
• Connected to properly located thermostat or operating
control (freewatt PLUS requires communicating
Smart Zone thermostat supplied with system and must
be installed and connected to “Zone 2”).
• Boiler requires combustion air intake to complete its
sealed combustion direct-vent system and provide air
from outdoors. HONDA MCHP requires make-up air
from installation space.
• Placed on level surface (must NOT be installed on
carpeting).
! CAUTION
Keep system area clean of debris and free of
flammable and combustible materials, vapors and
liquids.
• Condensate drain line must be pitched down to floor
drain or external condensate pump with reservoir at ¼”
per foot (wood frame or concrete blocks may be used
to raise boiler). MCHP unit must be bolted to concrete
floor as specified.
• Combustion air supply and boiler vent pipes must
terminate together in same atmospheric pressure zone,
through roof or sidewall (roof termination preferred).
Boiler and MCHP vent terminations may be at different
locations, feature may assist in locating appropriate
venting locations. Consult boiler and HONDA MCHP
Installation Manuals for specific guidelines for required
clearances and installation instructions.
7.4 Locating the System
• Select level location central to distribution system and
close to vent and air intake terminals.
• Use accessibility clearances for system installation, if
more stringent (i.e. larger clearances) than required
fire protection clearances.
• Refer to boiler Installation, Operation and Maintenance
Manual for guidelines regarding concentric vent
termination installation and guidelines.
• Must install MCHP unit on solid, concrete floor with
adequate make-up air available for 18,500 Btu/hr net
input heating appliance. System shall not be installed
on carpeting. Shimming should be done between base
and MCHP, not between base and floor.
• Install equipment in location facilitating operation of
venting and combustion air intake piping systems
described in this manual (Section 10).
20
7 -BEFORE INSTALLING THE SYSTEM
7.6 Condensate Drain Requirements
7.9 Requirements for Hydro-air Applications:
• Install condensate drain lines with pitch down to floor
at minimum of ¼” per foot.
• Application of freewatt PLUS with Hydro-Air System
Air Handler as Smart Zone requires Smart Zone Air
Handler be of type powered with ECM blower motor.
• External condensate pump (not furnished) may be used
if floor drain is not available. One condensate pump can
be used for both boiler and MCHP.
• VHBXB Air Handlers manufactured by First Co. having
ECM blower motor are known to work with freewatt
PLUS System.
• Use condensate pump designed for flue gas condensate
application.
• Consult factory for additional information before
application of other air handlers with Smart Zone of
freewatt PLUS System.
• Consult boiler and Honda MCHP Installation Manuals for
guidelines for condensate drain installation.
NOTICE
It is recommended no additional electrical
connections be made within freewatt PLUS
System for line power. Separate junction box
and receptacle should be provided if line power is
required for condensate pump,.
7.7 Foundation Requirements
• Place system on level concrete surface. DO NOT install
on carpeting.
• System: Level System will allow the condensate drain
lines to function properly. Shims should be used
between boiler, floor, MCHP and base to make up for
minor surface irregularities or tilt.
• HI Module: The HI Module will be mounted on boiler or
nearby wall.
• Honda MCHP: Honda MCHP is supplied with a base to
raise unit above floor and secure to concrete floor.
7.8 Removal of Existing Furnace from Common
Vent System
Existing common venting system is likely to be too large
for proper venting of appliances remaining connected to
it. Refer to decommissioning procedure outlined in boiler
Installation, Operation and Maintenance manual.
21
8 - PLACING THE SYSTEM
8.1 Place system to provide direct connections
to:
CAUTION
Penetration or modifications of MCHP cabinet will
result in potential electrical or fire hazard. Do
not attach controls, wire, piping, conduit or other
hardware to MCHP unit.
• combustion air/vent piping system,
• natural gas piping,
• return and supply duct-work,
• condensate removal system,
• Place HONDA MCHP on base and secure MCHP unit to
base with supplied hardware after base installed. See
Figure 8-1.
• electrical connections.
• Determine location of Hydronic HI Module enclosure.
Mount enclosure on solid wall or partition. Recommend
enclosure be located close to HONDA MCHP. HI module
may be mounted up to 10 feet away from HONDA
MCHP unit. Locate enclosure with installation and
service accessibility in mind.
8.2 Instructions for preparation and placement
of Hydronic freewatt PLUS System:
• Determine location for boiler, MCHP and indirect hot
water tank (if used), identify location for hydronic
HI module, relay switches and circulators. Typical
configuration for Hydronic freewatt PLUS System is
shown in Figure 2-1.
• Hydronic HI Module bottom should be installed at
height of 32” to 42” above floor elevation where
base of HONDA MCHP is installed.
• Place crated boiler and HONDA MCHP unit as close to
selected location as possible and un-crate units.
• Ensure top of Hydronic Hybrid Integration (HI)
module is mounted above Honda MCHP’s top cover.
HI Module bottom should not be above MCHP top.
• Follow instructions outlined in freewatt PLUS Boiler
Installation, Operation and Maintenance Manual for
placing boiler. See Figure 2-2 for boiler details.
• Hydronic piping between HI module and primary
hydronic loop manifold should not exceed 40 feet.
Piping and circulator should be designed for water
flow rate of 4gpm. HI module heat exchanger
pressure drop is approximately 1 psi.
• System configuration and final placement should allow
for future servicing of equipment.
• See Figure 8-2 for typical piping schematic to assist
in determining layout of freewatt PLUS system
components.
• Position enclosure, check for level, mark mounting
holes.
• Reference HONDA MCHP Installation Manual for
instructions regarding placement.
• Start screws (#10 ,4 each, field source) for keyhole
type mounting holes in upper corner(s). Tighten
screws down to about 1/8” (3mm) from surface.
• Install MCHP unit base as specified in HONDA MCHP,
Model YM2Z, Installation Manual and Owner’s Manual
as summarized below and Figure 8-1.
• Place base on concrete floor and level.
• Hang enclosure on screws, position enclosure and
start bottom screws.
• Mark anchor bolt locations on concrete floor.
• Tighten all screws.
• Drill hole diameters in concrete for anchor bolts
per manufacturer’s installation instructions. If
obstruction is hit, move base and re-drill.
Figure 5-1 MCHP Base Installation
• Attach base to anchor bolts with supplied hardware.
• Locate washers between MCHP and base if unit
needs to be shimmed level.
• Orientation of bolt & nut is important. Bolt must be
installed from top with nut on bottom. Use nuts and
bolts supplied in installation kit. Do not use shipping
bolts which attach MCHP to shipping pallet.
• Do not make penetrations or drill holes in MCHP unit
cabinet.
22
8 - PLACING THE SYSTEM
• Figure 8-2 shows freewatt PLUS distribution piping
schematic for system zoned with zone valves for
heating zones and priority pump for indirect water
heater zone. Configuration of heating zones, boiler
and MCHP heat sources shown is mandatory for proper
operation of freewatt PLUS System.
8.3 freewatt PLUS System Piping
• Place equipment in proper locations.
• Configure system piping to connect boiler and HONDA
MCHP to distribution piping.
• Hydronic freewatt PLUS piping configuration is
modified primary-secondary, allowing heat from MHCP
unit be injected into return piping upstream from
freewatt PLUS boiler. Configuration ensures coldest
return water be delivered to MCHP unit’s hydronic
hybrid integration (HI) module.
• See piping schematics in Section 17 for circulator zoned
systems, valve zoned systems and systems with air
handlers.
Figure 8-2 Hydronic Freewatt PLUS System Distribution Piping Schematic with Zone Valves and
Priority DHW Pump
23
8 - PLACING THE SYSTEM
NOTICE
8.4 Design Tips
• Install bottom of Hydronic HI Module at height of
32” to 42” above floor elevation where HONDA MCHP
installed.
Use only long life coolant supplied with freewatt
PLUS System. Use of any other coolant will void
warranty.
System will not operate properly and permanent
damage to Hydronic HI Module or HONDA MCHP
may occur if followings steps are not followed.
• Maximum 10ft. length of ½” Onix coolant tubing
connecting Hydronic HI module and MCHP.
• Install mixing valve if indirect hot water tank is
installed. Mixing valve will provide anti-scalding
protection and allow for summer operation of MCHP
unit. Review installation requirements supplied with
Indirect Water Tank.
Following steps are required to install long life coolant (LLC)
tubing between Hydronic HI module and HONDA MCHP.
Figure 8-3 MCHP Coolant Loop Drain Tee (LLCLong Life Coolant Supplied with System)
8.5 Near Boiler Piping
• Do not install Copper piping directly into aluminum
boiler casting due to galvanic corrosion between
dissimilar metals. Two (2) dielectric isolation unions
shipped loose in boiler parts bag. Install dielectric
isolation unions at boiler supply and return line. Use of
dielectric unions is required. freewatt PLUS boiler
furnished with iron piping where necessary for supply
and return connections.
• Configure near boiler piping in accordance with
freewatt PLUS Boiler’s Installation, Operation and
Maintenance Manual. Overall configuration with MCHP
unit and heated zones must be in conformance with
Figure 8-2.
• freewatt PLUS Boiler provided with 1 ¼” NPT return
and supply piping connections shown in Figure 2-2.
8.7 HI Module coolant tubing:
• Prepare rear connections (LLC In and LLC Out) of
MCHP unit with pipe thread sealant. Install ½” NPT
brass street elbow onto drain fitting before installing
1/2” NPT street elbow onto MCHP unit’s 1/2” MNPT LLC
Out fitting. Install other 1/2” NPT brass elbow onto
MCHP unit’s LLC In fitting. Install 1/2” NPT x 1/2” barb
fittings into drain fitting and 1/2” NPT elbow. Point
fittings in direction of front of hydronic HI Module.
Figures 8-3, 8-4 and 8-5.
• freewatt PLUS Boiler Installation, Operation and
Maintenance Manual includes directions on distribution
system requirements, including expansion tank, makeup water, air separator, air vent and condensate drain
piping (pump).
• Install 1 ¼” ball valves on supply and return legs of
boiler connection to allow for servicing of boiler or
circulators.
• Long Life Coolant Out Tubing Installation [MCHP to
BPHX; Figure 8-5]:
8.6 Honda MCHP & Hydronic HI Module
• Install MCHP near piping in accordance with HONDA
MCHP installation manual and instructions found in this
section.
• Attach supplied 1/2” brass Tee to threaded heat
exchanger fitting located on bottom of HI Module as
shown. (Apply pipe thread compound)
• Typical piping configuration is shown in Figure 2-1,
shows MCHP connecting to hydronic HI Module.
Hydronic HI Module connects to hydronic water
distribution system.
• Attach supplied 1/2” NPT x barb fittings to remaining
threads on brass Tee. (Apply pipe thread compound)
• Attach supplied 12.5” length of tubing to front of
brass tee. Route cable through sheet metal as
shown. Attach stackable hose barb fitting and insert
into HOT side of mixing valve. Secure fittings using
tubing clamps.
• Place hydronic HI module in location allowing MCHP to
connect with maximum 10 feet of ½” Onix tubing, while
also located vertically above MCHP unit (32” to 42”
above MCHP’s base level).
• Install Onix™ tubing from top rear LLC connection
on MCHP, to hose barb on bottom of tee. Secure
• Onix tubing used to isolate vibrations from Honda
MCHP unit and is provided with installation kit.
24
8 - PLACING THE SYSTEM
Figure 8-4 MCHP Coolant Line Installation Instructions
Figure 8-5 LLC Out Connection to HHI Module
(BPHX)
Figure 8-8 Female Swivel Fitting (NPT by IPS)
using tubing clamp.
• Long Life Coolant In Tubing Installation: [Pump to
MCHP; Figure 8-6]
• Cut section of Onix Tubing to extend from MCHP
unit’s lower Coolant connection to coolant pump in
HI Module.
• Install barbed end of elbow (barb x IPS) fitting into
open tube end of tubing and secure with SelfTite
clamp. Figures 8-7 and 8-8
Figure 8-6 LLC In Connection to Pump
• Route tubing through hole in bottom of Hydronic HI
Module.
• Insert IPS end of same elbow (barb x IPS) fitting
into female IPS swivel fitting (Figure 8-7 and 8-8)
on coolant pump and secure with collet clip supplied
with female swivel fitting.
• Route tubing to rear of MCHP (if necessary through
open channel in front of MCHP base) and cut to
length.
• Install tubing onto lower brass hose barb fitting (LLC
In) and secure SelfTite clamp onto tubing.
Use only Watts Radiant brass barb fittings with Onix tubing
supplied with freewatt PLUS System. Off-the-shelf brass
fittings are made to different dimensions and tolerances,
which may result in leaks.
Figure 8-7 - Hose Barb by IPS Elbow Fitting
25
8- PLACING THE SYSTEM
8.8 HHI Module to Distribution Manifold
Figure 8-9 HI Module to Distribution Manifold
Piping
• Follow industry standards when installing distribution
manifold.
• Install MCHP hydronic pump below manifold to prevent
circulator from air locking.
• Size tubing or piping connecting Hybrid HI module
with distribution manifold ½” NPT or larger to provide
adequate flow for transfer of heat from MCHP’s coolant
into hydronic water.
• Pump shall provide flow of at least 4 gpm to brazed
plate heat exchanger (~1 psi Pressure Drop) in
Hydronic HI Module. Grundfos SuperBrute Pump
(UPS1558FC) is suggested.
• See Figure 8-9 design example of piping.
• Installation
A. Attach two supplied 1/2” NPT X barb fittings to
threads on bottom of heat exchanger per Figure
8-11. Apply pipe thread compound.
B. Attach Onix tubing to barbs securing with Selftite
clamps.
8.9 HHI Module Heat Rejection System
Connections
Figure 8-10 Condensate Lines
NOTICE
Follow these steps to ensure proper system
operation and prevent permanent damage to
Hydronic HI Module or Honda MCHP.
NOTICE
Follow detailed instructions provided with heat
rejection accessory kit to construct heat rejection
piping loop.
Following steps are required to connect heat rejection system to Hydronic HI Module for Heat Rejection cooling.
• Install pipe or tubing from supplied heat rejection loop
to BPHX. Ensure counter flow between heat rejection
fluid and MCHP Coolant. See Figure 8-12.
Figure 8-11 Hydronic freewatt® PLUS HI
Module
• Install pipe or tubing from outlet of BPHX to heat rejection loop.
8.10 Condensate Drain Piping
NOTICE
From
Hydronic Loop
Boiler and MCHP’s drain trap assembly must be
filled with water before operating system. Dry trap
may cause pressure switches to behave erratically,
preventing boiler from operating normally, or cause
exhaust products to enter building space.
To
Hydronic Loop
26
8 - PLACING THE SYSTEM
• freewatt PLUS boiler and MCHP unit will produce
condensate at rates up to 2 ½ US quarts per hour.
Make provisions to drain condensate away from both
boiler and MCHP to ensure proper operation. Boiler
is supplied with factory-installed drain trap assembly
with ½” dia. Sch. 40 PVC connection.
Figure 8-12 Heat Rejection Connections to HHI
Module (BPHX)
• Install MCHP condensate line directly into condensate
pump, located directly behind MCHP unit, if floor drain
is not available. Condensate line should have “Y
connector” to ensure tubing is open to atmosphere,
removing chance for air lock in line. Figure 8-10.
Route boiler’s condensate line behind MCHP unit and
install directly into condensate pump.
• Supplied boiler condensate vent drain T must be used.
Heat Rejection
OUT
• Do not make any additional electrical connections
within freewatt PLUS System for 120 VAC power.
Separate junction box and receptacle should be
provided if 120 VAC power is required for condensate
pump.
Heat Rejection
IN
• Review installation instructions for boiler and HONDA
MCHP to ensure a proper installation.
8.11 Onix Clamps
• Do not use screw gun or wrench to tighten TorqueTite
clamps.
• Safety glasses must be worn when installing SelfTite
Clamps.
• Minimum bending radius of ½” Onix tubing is 4”.
• Onix requires special Torque-Tite or Self-Tite
mechanical clamps, designed for higher temperature
and burst pressure ratings.
• Self-Tite clamps are supplied with freewatt PLUS
System.
• TorqueTite clamps are heavy-duty screw-type,
wide-band, stainless steel clamps. In. per lb. torque
wrench is required to install. Tightened each clamp
according to proper torque setting for size of clamp
used. Torque settings are listed on instruction
sheet supplied with clamps.
• Do not over tighten TorqueTite clamp.
Overtightening may cause long-term damage to
Onix tubing and/or to clamp itself.
• SelfTite Clamps are chrome-vanadium, constant
tension clamps. Watts Radiant recommends using
SqueezeTite pliers to properly open and install clamps.
• Do not allow clamp to flatten while being held open.
Flattened clamps will not fit properly over Onix and
barb assembly.
27
8 - PLACING THE SYSTEM
• Expand ECR control using appropriate ECR
expansion relay controls if additional zones are
needed.
• All Onix and brass fitting surfaces must be clean and
dry before making connection.
• Avoid making connections or splices in inaccessible
locations.
• Two air handlers with circulators can be accommodated
through use ECR ARH-3 control.
• Repairing Onix having been in service in freewatt
PLUS System requires special attention. Any residual
amounts of freewatt PLUS long life coolant inside
Onix tube must be removed. Use an alcohol swab or
pad to remove residue(s), allow tube to dry prior to
connection.
• One air handler must be “Zone 2 - Smart Zone”.
• If additional zones are needed, expand ECR control
using appropriate ECR expansion relay controls.
• Select “Smart Zone” as zone with largest heating
demand (but not domestic hot water zone). This
would normally be largest space in heating zone on first
floor of two story home. freewatt PLUS System will
produce best electric power generation benefit if Smart
Zone represents 25% of total home heating load. If
there is no single large zone in existing distribution
system, but many small zones, consider combining
zones to achieve desired heat load for the Smart Zone.
NOTICE
Do not solder near, or overheat, any Onix
connections. Extreme temperatures associated with
soldering may seriously damage Onix and will void
warranty.
8.12 Configuration of Heating Zones and
Controls
Installations of Hydronic freewatt PLUS System require
use of AR-822-II for operation of circulator that provides
hydronic water flow to HI Module.
• Hydronic freewatt PLUS System may be applied to
variety of heating loads served by conventional, multizone hydronic heating systems. Including base-board
radiation, radiant floor heating, domestic hot water
via indirect storage tank, powered convective heaters,
hydro coils, and others.
• Use correct ECR zone control accessory kit, ordered
separately, for type of zoning to be applied with
hydronic freewatt PLUS System. Kit includes
freewatt smart zone communicating thermostat,
AR822-II pump relay for MCHP hydronic loop pump,
and appropriate zone control relay as follows:
• Use Zone Pump Zone Control Accessory Kit which
includes ARM-6P for pump zoned systems,
• Use Zone Valve Zone Control Accessory Kit which
includes AZ-6CP for valve zoned systems,
• Use Hydro-Air Zone Control Accessory Kit which
includes ARH-3 for distribution systems with air
handlers.
• Thermostats for up to six zones, must be wired through
freewatt PLUS Control Module.
• One zone of six zones must designated “Zone 2 Smart Zone”.
• Zone 1 is used to accommodate indirect water
heater having its own dedicated circulation pump.
• Required ECR heating zone relay controls for use with
pumped zoned systems (ARM-6P) and valve zone
systems (AZ-6CP) can accommodate total of 6 zones.
28
9 - EXHAUST GAS LEAK SENSOR
• Figure 9-1 shows connections to Exhaust Gas Leak
Sensor. Exhaust Gas Sensor will automatically stop
operation of MCHP unit upon detection of potentially
dangerous levels of carbon monoxide gas regardless of
source of carbon monoxide gas.
9.1 EGLS Introduction
• Exhaust Gas Leak Sensor System in addition to
separate, independently installed and operating UL
approved Carbon Monoxide Detector having audible
alarm.
• Install both Exhaust Gas Leak Sensor (supplied with
freewatt PLUS) and audible UL approved Carbon
Monoxide Detector (not supplied with freewatt
PLUS).
9.2 Preparation
Following items must be installed before Exhaust Gas Leak
Sensor can be installed:
• Boiler, Control Module & Hydronic HI Module
• freewatt PLUS System and freewatt PLUS Exhaust
Gas Leak Sensor do not provide audible alarms for
protection of building inhabitants from potential high
CO hazards.
• Honda MCHP Unit
• Thermostat
• Function of freewatt PLUS Exhaust Gas Leak Sensor
System is to automatically stop operation of MCHP unit
in event it detects potentially hazardous level of carbon
monoxide in vicinity of MCHP unit.
! WARNING
Exhaust Gas Leak Sensor does not fulfill
independent CO detector and audible alarm
requirement of freewatt PLUS System.
freewatt PLUS System requires separate CO
alarm for protection of building inhabitants.
Separate freewatt PLUS System installation
requirement is fulfilled by complying with State
of Massachusetts’s CO detector and alarm
requirements. Your state or local jurisdiction may
have additional requirements regarding carbon
monoxide detectors and alarms.
• freewatt PLUS System Exhaust Gas Leak Sensor
System uses Macurco CO Detector connected directly
to Honda MCHP Unit. Read following installation
instructions:
• Read and understand installation and operation
manual for Macurco CO Detector part of Exhaust Gas
Leak Sensor System.
• Install Macurco CO Detector per manufacturer’s
instructions in close proximity of HONDA MCHP unit.
• Install four-wire cable from HONDA MCHP to
Macurco CO Detector.
9.3 Installation
• Verify cable properly secured (Maximum interval:
every 3 ft.)
Exhaust Gas Leak Sensor is connected to HONDA MCHP
unit using four conductor stranded insulated cable supplied
by Honda. Follow installation instructions below to ensure
proper operation of Exhaust Gas Leak Sensor:
• Exhaust Gas Leak Sensor (EGLS) monitors integrity of
MCHP unit’s combustion system shutting down MCHP
unit if potentially unsafe conditions are detected.
Honda MCHP Connection
• 4-pin cable connector to the HONDA MCHP for the
Exhaust Gas Leak Sensor is factory-supplied and field
installed. The HONDA MCHP installation kit includes an
electrical schematic for the wiring details.
• Monitors carbon monoxide level in air space
near MCHP unit. EGLS is independent of, and
separate from, audible CO alarming system that
must be installed with freewatt PLUS System in
compliance with best practices for all fuel-fired
central heating equipment.
• See HONDA MCHP Installation manual for the
connections to the HONDA MCHP and for any servicing
or troubleshooting.
! WARNING
Exhaust Gas Leak Sensor Connections
• Field install cable connection to Exhaust Gas Leak
Sensor after installation of sensor. Figure 9-1 shows
field connections of supplied cable to Exhaust Gas Leak
Sensor.
freewatt PLUS Exhaust Leak Gas Sensor does
not fulfill State of Massachusetts’s CO detector
and alarm requirement. Exhaust Gas Leak Sensor
does not provide an audible alarm for potentially
hazardous CO levels.
• See MCHP Installation manual for connections to
HONDA MCHP for servicing or troubleshooting.
• Exhaust Gas Leak Sensor is supplied with Hydronic
freewatt PLUS System and is intended for installation
in close proximity of HONDA MCHP unit.
• Field install jumper wire between second terminal (F)
and fourth terminal (N.C.). May need to install another
Jumper between COM and B terminals instead of using
crimp.
29
9 - EXHAUST GAS LEAK SENSOR
NOTICE
NOTICE
Exhaust Gas Sensor’s cable connections must be
installed properly or Hydronic freewatt PLUS
System will not initialize and not operate (ERROR –
14 or 15 Flashes).
LED indicator on Exhaust Gas Sensor must be solid
green. Sensor is initializing if it is flashing red
and green. Wait 3 minutes until LED is solid green
before proceeding.
For more instructions on connecting Exhaust Gas Leak
Sensor SEE MCHP IOM.
4. Confirm HONDA MCHP unit has stopped operating,
and red “Service Required” LED on freewatt PLUS
System’s front panel is blinking error code “16”, and
yellow “Bypass” LED is on.
5. Clear error condition. Turn OFF 120 VAC freewatt
PLUS System Service Switch and 240 VAC Honda
MCHP Service Switch.
6. Reconnect LAN cable to freewatt PLUS System.
7. Turn power ON to HONDA MCHP 240 VAC Service
Switch, turn ON freewatt PLUS System 120 VAC
Service Switch, to return system to normal operation.
9.4 Test Procedure
Test Exhaust Gas Leak Sensor to ensure proper operation
before commissioning system. Use Exhaust Gas Leak
Sensor test button in accordance with procedure below.
Procedure will stop MCHP unit. See “Troubleshooting”
Section 16 if MCHP unit does not stop,.
1. Disconnect freewatt PLUS System from Internet.
Temporarily disconnect LAN (local area network) cable
from side of freewatt Control module or disconnect
LAN cable where it plugs into home’s network.
2. Power is supplied to Exhaust Gas Leak Sensor by
MCHP. MCHP must be operating during testing of
Exhaust Gas Leak Sensor. Turn thermostat up until
MCHP operates, if MCHP is not operating.
3. Wait for LED on Macurco CO Detector to begin glowing
green. Press button on Exhaust Gas Leak Sensor
labeled “Push Here to Test or Reset” for 6 seconds,
when LED on Macurco CO Detector is glowing green
continuously. This should cause freewatt PLUS
System error condition.
Exhaust Gas Sensor must be replaced every 5 years with
identical unit, installed by qualified and properly trained
service personnel.
freewatt PLUS generator will stop and red service
required LED will indicate fault by flashing 16 times if you
push test button on freewatt PLUS Exhaust Gas Leak
Sensor.
Fault message will be transmitted to freewatt PLUS
service center if your system is connected to internet.
Clear fault condition to restore MCHP operation. Shut off
electrical power to freewatt PLUS System and restore
power to reset system using power switch on freewatt
Control module to clear fault.
Figure 9-1 Exhaust Gas Leak Sensor
Connections
30
10 - COMBUSTION AIR AND VENT PIPE
• Combustion air pipe and vent connections on boiler are
2” pipe size. Installed combustion air pipe and vents for
boiler must be 3” size and, 2” to 3” pipe coupling must
be used at boiler connections. MCHP vent connection
size is 2”. 2” or 1-1/2” vent size is permitted. Refer
to freewatt PLUS Boiler Installation, Operation and
Maintenance Manual and MCHP IOM for specific venting
instructions.
! WARNING
Read, understand and follow all instructions. Failure
to properly vent or supply combustion air to boiler
can cause carbon monoxide poisoning, or an
explosion or fire, personal injury or loss of life.
10.1 General Considerations
• Exhaust transition from 2” pipe to 3” pipe must
be made in vertical run. Transition pieces are not
included. (See boiler installation manual for more
details.)
• Perform tasks outlined in Section 5 of freewatt PLUS
boiler Installation, Operation and Maintenance Manual,
section “Removal of Existing Boiler from Common Vent
System” if system will be replacing Category I type
boiler connected to chimney serving other appliances.
• Vent installations shall be in accordance with ANSI
Z223.1/NFPA 54, CSA-B149.1 and B149.2, or authority
having jurisdiction.
10.2 Combustion and Vent Piping Length
Refer to direct vent and non-direct combustion air and vent
sections outlined in installation guides for boiler and Honda
MCHP for specific installation procedures and specifications.
• Provisions for combustion and ventilation air shall be
in accordance ANSI Z223.1/NFPA 54, CSA-B149.1 and
B149.2, or authority having jurisdiction.
10.3 Installation
• Hydronic freewatt PLUS System has two separate
components requiring combustion air and discharge of
combustion products.
• Refer to direct vent and non-direct combustion air and
vent sections outlined in installation guides for boiler
and HONDA MCHP for specific installation procedures
and specifications. General guidelines for air intake
and vent piping are found in FW95M-200 Boiler
Installation, Operation and Maintenance
Manual.
• Boiler component requires dedicated direct vent
system. All air for boiler’s combustion is taken
directly from outdoors through combustion air intake
pipe. All combustion products are discharged to
outdoors through vent pipe.
• Use of periscopes on air intake and venting are allowed.
Insulate periscopes with proper weather-resistant pipe
insulation if extend over 24” in length, straight length.
• Honda MCHP takes combustion air from interior
open space and all combustion products are
discharged to outdoors through vent pipe.
• See installation instructions in boiler and HONDA MCHP
manuals for combustion air and vent pipe roof and
sidewall termination (Roof termination is preferred).
Combustion air and vent pipes for freewatt PLUS
Boiler must terminate together in same atmospheric
pressure zone as shown. Boiler and MCHP exhaust
vents need not be in same general location on exterior
of building. Construction through which vent and air
intake pipes may be installed is maximum 24 inches,
minimum ¼” thickness.
10.4 freewatt PLUS System Combustion Air
and Venting
Combustion air and venting installation procedures and
specifications are based on installation specifications of
boiler and MCHP. Installers are required to follow specific
installation requirements found in boiler and MCHP
installation manuals, following guidelines are taken from
these manuals.
• Combustion air and vent pipe fittings must conform
to American National Standards Institute (ANSI) and
American Society for Testing and Materials (ASTM)
D1784 (schedule 40 CPVC), D1785 (schedule 40 PVC),
D2665 (PVC-DWV), D2241 (SDR-21 and SDR-26 PVC),
D2661 (ABS-DWV), or F628 (schedule 40 ABS). Pipe
cement and primer must conform to ASTM standards
D2564 (PVC) or D2235 (ABS). In Canada construct
all combustion air and vent pipes for system of CSA or
ULC certified schedule-40 CPVC, schedule-40 PVC, PVCDWV or ABS-DWV pipe and pipe cement. SDR pipe is
not approved in CANADA.
10.5 United States Direct Vent System
Requirements
Boiler direct vent exhaust shall be installed in United States
in accordance with following requirements. Allowable
direct vent intake and exhaust piping lengths for boiler
are found in FW95M-200 Boiler Installation, Operation and
Maintenance Manual.
31
10 - COMBUSTION AIR AND VENT PIPE
NOTICE
Figure 10-1
Install boiler per Direct Venting requirements.
Install MCHP per Non-Direct Venting Requirements.
Distinction is noted to ensure proper location of vent
terminations.
Min. Separation
12”
3” Max Separation
• Clearance from bottom of termination to grade shall
be 12” or increased to maintain 12” above anticipated
accumulated snow level.
8”
• Vent shall not terminate over public walkways or over
area where condensate or vapor could create nuisance
or hazard.
7”
• Vent termination shall be installed at least 1 foot from
any opening through which flue gases could enter
building.
MCHP Vent
Boiler Vent
Boiler Air
Intake
• Vent termination shall have minimum horizontal
clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
3” Min.
• Locate vent terminal 3 feet horizontally from vent
of any side wall vented fuel gas appliance or clothes
dryer, except in case of hydronic freewatt PLUS
System where boiler and MCHP vents may be located
with respect to each other per Figures 10-1 or 10-2.
Figure 10-2
10.6 United States Non-Direct Vent System
Requirements
Non-direct vent exhaust for MCHP shall be installed in
United States accordance with following requirements; nondirect vent exhaust piping lengths for MCHP are found in
Honda MCHP Installation Manual:
• Clearance from bottom of termination to grade shall
be 12” or increased to maintain 12” above anticipated
accumulated snow level.
• Vent shall not terminate over public walkways or over
area where condensate or vapor could create nuisance
or hazard.
• Vent termination shall be installed at least 4 feet below,
4 feet horizontally from, or 1 foot above any door,
window, soffit, under eave vent or gravity air inlet to
the building.
• Vent termination shall have minimum horizontal
clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
• Locate vent terminal 3 feet horizontally from vent
of any side wall vented fuel gas appliance or clothes
dryer, except in case of hydronic freewatt Plus
system where boiler and MCHP vents may be located
with respect to each other per figures 10-1 or 10-2.
32
11 - GAS SUPPLY PIPING
CAUTION
Table 11-1 Gas Supply Pressures
Units cannot operate properly or safely using fuels
outside normal commercial standards. Connect
boiler and HONDA MCHP units only to gas supplied
by commercial utility or supplier. Private gas
wells do not generally provide gas with consistent,
uniform and predictable heating values and
densities. Many non-commercial wells contain
impurities such as sulphur, which may damage
furnace or HONDA MCHP.
Gas tyoe
Minimum
(in. w.c.)
Nominal
(in. w.c.)
Maximum
(in. w.c.)
Natural
4”
7”
10”
Propane
10”
12”
14”
Consult boiler and HONDA MCHP installation procedures for
leak testing and purging gas lines.
11.2 Gas Piping
Consult boiler and HONDA MCHP installation procedures for
specific instructions regarding gas piping.
11.1 Check Gas Supply
• Gas pipe to boiler must be correct size for length of run
and for total BTU per hour input of all gas utilization
equipment connected to piping. See Tables in boiler
and HONDA MCHP installation manuals for proper
size. Verify gas line complies with authority having
jurisdiction.
• freewatt PLUS Boiler and MCHP units’ individual
shutoff valves must be disconnected from gas supply
piping system during any pressure testing of system at
test pressures in excess of ½ psig (3.5 kPa).
• freewatt PLUS Boiler and MCHP unit system must
be isolated from gas supply piping system by closing
respective individual manual shutoff valves during any
pressure testing of gas supply piping system at test
pressures less than or equal to ½ psig (3.5 kPa).
• Recommend line pressure be within minimum and
maximum values in Table 11-1 for proper operation of
system.
33
12 - ELECTRICAL WIRING & CONNECTIONS
! WARNING
Figure 12-1 Typical freewatt PLUS Control
Module Configuration
Electric shock hazard. For your safety, turn off electrical power supply at service panel before making
any electrical connections. Failure to do so can cause
severe personal injury or death.
12.1 Codes
Installation must comply with National Electrical Code, authority having jurisdiction, and in Canada, with CSA C22.1 Canadian
Electrical Code and authority having jurisdiction.
NOTICE
Wiring shall be N.E.C Class 1. Use only type 105°C
wire or equivalent if original boiler wiring must be
replaced. System shall be electrically grounded as
required by National Electric Code ANSI/NFPA 70.
• Mounting 2 ft. wide x 4 ft. high sheet of plywood provides
mounting surface for control module, relay switches and HHI
module. Unit may be mounted up to 20 feet away. Locate
enclosure with installation and service accessibility in mind.
12.2 Line Voltage Connections
System installation must include :
• 120 VAC dedicated circuit (15 amp) to Boiler, control
module, circulator pumps and relay switches.
• Position control module enclosure above ECR relay
switches, place enclosure on relay switch modules with
four ½” off set nipples, level, and mark mounting holes.
• 120 VAC dedicated circuit will extend up to freewatt
Transfer Switch.
• Start screws, #10, 4 each (field sourced) for keyhole type
mounting holes in upper corner(s). Tighten screws down
to 1/8” (3mm) from surface.
• 240 VAC dedicated circuit (2 pole; 15 amp) to HONDA MCHP
unit.
• Hang enclosure on screws, level enclosure and tighten
screws.
• 240 VAC dedicated circuit shall have serviceman’s
switch field installed near Honda MCHP on circuit
between main service panel and freewatt Transfer
Switch.
• Install four nuts on ½” offset nipples to secure enclosure
to relay switch modules. Figure 12-1 .
! WARNING
9.3 Line Voltage Wiring Specifications
• 240 VAC Wiring: All wiring must conform to National
Electric Code and authority having jurisdiction. Wiring
must be N.E.C. Class 1. In Canada, C.S.A. C22.1
Canadian Electrical Code Part 1 and authority having
jurisdiction. Wiring must be C.S.A. C22.1 C.E.C. Part 1.
• 120 VAC Wiring: All wiring must conform to National
Electric Code and authority having jurisdiction. Wiring
must be N.E.C. Class 1. In Canada, C.S.A. C22.1
Canadian Electrical Code Part 1 authority having
jurisdiction must be followed. Wiring must be C.S.A.
C22.1 C.E.C. Part 1.
Electric shock hazard. Do not route un-switched
line-powered cables or wires through freewatt PLUS
System. Failure to do so can cause severe personal
injury or death.
Recommend no additional electrical connections be made
within freewatt Control module for line power. If line
power is required for condensate pump, separate junction
box and receptacle should be provided.
120 VAC dedicated circuit shall conform to NEC and use as
minimum 3-conductor, 14 Ga. Cable.
12.5 Wiring Instructions
• Provide and install non-fused disconnect or 120VAC
service switch ( 15 amp recommended) as required by
authority having jurisdiction.
12.4 freewatt Control Module Installation
• Mount module’s enclosure on solid wall or partition after
determining location of freewatt module. Recommend
enclosure be located close to freewatt PLUS Boiler,
Honda MCHP and HI Module, within reach of supplied, preterminated cable.
• Route 120 VAC power wiring from service switch to boiler’s
line voltage terminal strip on boiler control panel as outlined
in freewatt PLUS Boiler Installation, Operation and
Maintenance Manual. See Location 8 in Figure 12-2.
34
12 - ELECTRICAL WIRING & CONNECTIONS
• Route 120 VAC power wiring from service switch to ECR
AR822-II and attach to 120 VAC power terminals.
Figure 12-2 Boiler 120 VAC Connections
(Refer to Electrical Schematic)
• Route 120 VAC power wiring from junction / switch
box to ECR ARM-6P (or AZ-6CP or ARH-3). Wiring can
be routed through ½” offset nipple connector and into
control module enclosure. Connect 120 VAC power
wiring to 12 VDC power supply’s pig tail in control
module using wire nuts, attach ground wire to control
module enclosure grounding screw located inside
bottom of enclosure. Figure 12-3.
• Wire control module to zone relay control and AR822-II
following appropriate freewatt PLUS System low voltage
and line voltage electrical schematics.
• Wire circulators and MCHP’s hydronic pump to zone relay
control and AR822-II following instructions found in their
installation manuals and freewatt PLUS System electrical
schematics.
Figure 12-3 Control Module 120 VAC
Connections
• Connect MCHP Coolant Pump’s 24VDC power cable to system
controller.
• Connect 24 VAC circuits between boiler control and
freewatt Control Module per applicable electrical
schematic.
• Configure jumper on control module circuit board (Figure
12-4) for set-up of hydronic system water heating and
space heating zones. Install jumper on DHW pins if zone 1 is
connected to aquastat in indirect water tank. Install jumper
on HEAT pins If zone 1 is connected to thermostat for space
heating. Zone 1 input on the control module must be used
for indirect water heater if indirect water heater is used with
freewatt PLUS System.
• Connect Coolant Pump in HI Module to Control Module J04
connector using furnished coolant pump cable.
Figure 12-4 Control Module Configuration DHW or
CH Jumper
12.6 ECR Zone Relay Controls
• Install appropriate ECR Zone Relay Control for temperature
control of different heating zones and accommodation of
indirect water heater (if used). Refer to Electric Schematics
for specific wiring details.
• Use ECR ARM-6P control for freewatt PLUS Systems
zoned with circulators ARM-6P control will accommodate up
to six zones. Expand ARM-6P with additional ARM controls if
more zones are needed.
• Use six-zone ECR AZ-6CP For freewatt PLUS System’s
zoned with valves. AZ-6CP can be expanded up to ten zones
with water heating priority with additional AZ control.
• Use three zone ECR ARH-3 control, expanded with additional
ARH controls for freewatt PLUS Systems with air
handlers (hydro-air).
• DHW priority dipswitch on zone control applies only in
bypass mode. DHW priority in MCHP mode is determined
by firmware setting in freewatt control module accessible
via MINT software. Default setting is priority ON when DHW
enabled.
35
12 - ELECTRICAL WIRING & CONNECTIONS
• External controls with their own 24VAC transformer may
be used on zones 3-6. Steering relays can be used through
freewatt control module jumpers JPZ3, JPZ4, JPZ5 and JPZ6
(for zones 3-6 respectively). These jumpers are located on
the center of the freewatt control board.
• IMPORTANT: “Priority Selection Switch” must be
in “ON” position when “Zone/Valve Pump” Switch
is in “ON” position. Install jumper wire between
terminals 3 and 4 of “Zone 1” output of AZ-6CP
control when setting “Zone/Valve Pump Selection
Switch” in “ON” position,. Jumper not required
when using zone valve (no indirect water heater
with separate “Priority” circulator) on Zone 1.
Wiring see “ Low Voltage Wiring: Primary/Secondary
Piping with Zone Valve and Domestic Hot Water
Priority Circulator”.
A. Control board will use 24V power from external
transformer attached to that zone when jumpers
are installed across pins.
B. Control board will use 24V power that board receives from connector J17 (1 Amp maximum, 2430 VAC) if jumper is not installed across pins.
• Set “Priority Selection Switch” “ON” when using indirect
water heater on Zone 1. Use switch to set operational
priority to domestic water heating when used with
Zone 1. Switch in “ON” position, call for heat by Zone
1 (indirect water heater) activates “Priority” pump
connecting to indirect water heater other zones will
temporarily deactivate. Temporarily, no space heating
supply in response to any space heating thermostats.
Priority LED on AZ-6CP will illuminate when priority
function is active. After 30 minutes priority is
terminated all zones will operate normally. Water
heating demand of Zone 1 not satisfied, 30 minute
temporary deactivation of all other zones will resume
and cycle will repeat. Set “Priority Selection Switch” to
“ON” for water heating priority and “OFF” for no water
heating priority on Zone 1.]
Connect G signal from air handler to zone 4 on freewatt
control module when using ARH-3 with air handler on
smart zone.
Refer to freewatt PLUS electrical schematics for wiring
instructions.
12.7 Circulator Zoned System - ECR ARM-6P
Dipswitch Settings
Priority Switch:
• Configure ECR ARM-6P for Domestic Hot Water (DHW)
Priority when freewatt PLUS System includes indirect
hot water tank. Place priority switch to ON position.
Zone 1 is heating priority. Zone 1 calls for heat all
other zones are temporarily deactivated (Priority LED
illuminated), priority switch is ON.
• “ZR-ZC Selection Switch”: Set to “OFF”
• “DPM-2 Selection Switch”: Set to “OFF”
• Timer automatically shuts off this feature if priority
zone (Zone 1) calls for heat longer than 30 minutes,
allowing all zones to operate. Cycle repeats in 30
minutes until priority zone is satisfied.
12.9 Hydro-Air Zoned System - ECR ARH-3 Settings
Priority Switch:
• freewatt PLUS System includes indirect hot water
tank. Configure ECR ARH-3 for Domestic Hot Water (DHW)
Priority. Place Priority Switch to ON position. Water heating
zone, is similar to description above for ARM-6P control
Priority operation of Zone 1.
• Match priority switch setting on ARM-6P to priority
setting in freewatt control module. Set using laptop
and MINT Software tool.
12.8 Valve Zoned System - ECR AZ-6CP
Dipswitch Settings
Set four AZ-6CP control “Option” switches as follows:
• “Zone Valve/Pump Selection Switch” Set to “ON”
when using Indirect Water Heater on Zone 1. Switch
allows operation of separate water heating “priority”
pump of Zone 1, configure for use with indirect water
heater having its own “priority” circulator pump and all
remaining zones are configured with single “primary”
circulating pump and individual zone valves. “Zone/
Valve Pump” Switch is in “ON” position for operation
of water heating “priority” pump in water heating
applications of Zone 1. Zone 1 is central heating zone
(no indirect water heater is configured) if “Zone/Valve
Pump” switch is “Off”, only Zone 1 zone valve terminals
are energized. Place “Zone/Valve Pump” Switch in
“OFF” position if indirect water heater is not connected
as Zone 1.
NOTICE
Recommended Breaker: 2-pole. 15 Amp breaker.
Flexible metal conduit is required to provide
vibration isolation for Honda MCHP.
240 VAC dedicated circuit should conform to NEC
and be minimum 4-conductor, 14 AWG flexible
metal conduit.
36
12 - ELECTRICAL WIRING & CONNECTIONS
12.10 Honda MCHP Unit - Line Voltage Connections
Figure 12-5 MCHP Connection Details
• Refer to Honda MCHP Installation Manual – Electrical
Connections Section before performing installation in
this section.
• Recommend Breaker: 2-pole; 15 Amp breaker.
• Remove cover plate, install blanking plate, connect
240 VAC power cable to terminal block on Honda MCHP
unit. Figure 12-5 and 12-10 and Honda MCHP IOM for
details.
• Provide and install 240 VAC disconnected switch and
junction box onto side of boiler or adjacent wall, route circuit
from main service panel to switch and back to freewatt
Transfer Switch, see electrical schematics. Route 240 VAC
circuit from freewatt Transfer Switch to Honda MCHP’s
electrical terminal block per Honda MCHP IOM. Do not attach
disconnect switch or junction box onto MCHP unit cabinet.
Do not make penetrations in MCHP cabinet.
Figure 12-6 T-Stat Connection to Controller
• Flexible metal conduit is required to provide vibration
isolation for Honda MCHP. Use NEC conforming,
minimum 4-conductor, 240 VAC dedicated circuit 14
AWG flexible metal conduit.
• Affix Generator warning label provided to main distribution
panel where it is clearly seen by any service personnel.
Figure 12-9.
12.11 HONDA MCHP Unit - Communication
Connections
• Connect Honda MCHP to control module with systemsupplied RS 232 communication cable (with attached
9-pin male connector). Plug connector in upper female
9-pin connector on exterior of right side of freewatt
Control Module. Route MCHP communications cable to
Honda MCHP and connect to communication port on
Honda MCHP.
Figure 12-7 Thermostat Connections
• Install strain relief just outside lower compartment.
Figure 12-8.
12.12 Smart Zone Thermostat Connections
Refer to instructions supplied with “Zone 2 - Smart Zone”
communicating thermostat for installation and operating
instructions. Connect thermostat cable to thermostat terminal
block, Figure 12-7. Thermostat cable extends from thermostat to
control module, routed through low voltage knockout on control
module enclosure, Figure 12-6.
• Install thermostat on inside wall away from influences
of drafts, hot or cold water pipes, lighting fixtures,
televisions, sun rays, or fireplaces. Install “Zone 2 Smart Zone” thermostat in accordance with guidance
provided in Section 2 and 3. (Heating load for Zone 2
Figure 12-8 MCHP Low Voltage Wiring Strain
Relief
37
12 - ELECTRICAL WIRING & CONNECTIONS
should not less than about 25% of total for building).
Figure 12-9 Generator Warning Label
• Connect thermostat cable to thermostat. Use Honeywell
Genesis Cable, Model Number 22 AWG 10/C STR CM-CL2 (or
equal) for HAI Smart Zone thermostat. Cable is 22 AWG, 10
Conductor, stranded cable meeting UL Standards 13 & 144,
NEC Article 725. Refer to freewatt PLUS HAI thermostat
Installation manual for additional thermostat connection and
option details.
• Route cable to control module. Cable will enter control
module’s enclosure through top knockout opening. Connect
to control module’s TSAT connections.
• Wire all other compatible zone thermostats (new or existing)
and Indirect Water Heater aquastat per instructions provided
by manufacturer. First six zones (including DHW if used)
connect directly on circuit board of freewatt control
module. All other zones connect directly to ECR zone relay
control.
• When set in the COOL MODE, freewatt PLUS thermostat
may be used to control air conditioning system. Remove left
terminal strip metal jumper between Terminal 1 (RC) and
Terminal 2 (RH) on freewatt PLUS System configurations
with ECR ARM-6P or AZ-6CP zone relay controls and separate
cooling 24 VAC transformer (additional to freewatt PLUS
System transformer) .
Figure 12-10 MCHP Line Voltage Connections
• Route air conditioning system 24 VAC source freewatt
PLUS Thermostat using spare grey wire in freewatt
PLUS thermostat cable. Use Y wire of thermostat cable
to connect directly to Y input of air conditioning system
(do not connect Y to freewatt PLUS control board).
Use external isolation relay for switching cool signal from
thermostat, if supplied thermostat does not have terminal for
RC.
• Wire thermostat for heating and cooling as indicated in wiring
diagrams for freewatt PLUS System configurations using
ARH-3 zone relay control with air handler.
12.13 Outdoor Temperature Sensor
• Mount supplied Tekmar 070 outdoor sensor on outside
exterior wall per sensor manufacturer’s instructions, shield
from direct sunlight or flow of heat or cooling from other
sources. Northern exposure is preferred.
• Route sensor’s wires through exterior wall into house and
through knockout on top of control module. Do not combine
wires of Tekmar Outdoor sensor with freewatt PLUS
Boiler Outdoor Sensor in single cable, electrical interference
will result. See Electrical Schematics.
12.14 Internet Connection
Control module has RJ 45 network connection. Connection found
at right of control module’s enclosure. Connection point accepts
CAT 5e cable.
38
12 - ELECTRICAL WIRING & CONNECTIONS
12.15 MCHP Battery Installation
Please see the Honda MCHP manual for
installation of the MCHP battery.
• Honda MCHP1.2D/MCHP1.2DP unit requires battery to
provide power to start up in backup power mode.
• Battery is provided for freewatt PLUS System,
however to insure proper battery storage and charge
level, battery is not packaged with system.
• Battery must be ordered at time of installation from
ECR Customer Service by freewatt dealer performing
installation.
• Original battery provided for each freewatt PLUS
System will be shipped to installing dealer at no
charge.
• Following information must be provided to obtain
battery:
A. Either Honda MCHP Serial Number or freewatt
PLUS System Serial Number.
B. Your freewatt dealer name or dealer number.
C. Desired ship-to address.
Call ECR freewatt Customer Service toll free at 866-9446247 to order battery.
NOTICE
IMPORTANT - Honda MCHP unit will not operate without a
battery. Use only battery specifically designed for use in
Honda MCHP.
39
13 -COMMISSIONING AND STARTUP
13.1 For System commissioning and startup procedures,
refer to literature packet document “Hydronic freewatt
PLUS System, Model HDJ Commissioning Procedure”.
You may also refer to the Commissioning Procedure
Manual for basic freewatt PLUS system sequence of
operation.
40
14 - MAINTENANCE AND CLEANING
• Coolant Level: Check coolant level in coolant tank
and fill with coolant, if necessary.
! WARNING
Disconnect electrical power supply to freewatt PLUS
System before attempting any maintenance. Failure
to do so can cause electrical shock resulting in
personal injury or loss of life.
• Mixing Valve: Check coolant temperature being
delivered by valve while system is operating. Check
for leaks and fix, if necessary.
• Pump: Inspect pump and connections. Check for
leaks and fix, if necessary.
! WARNING
• Coolant Tubing and Connections: Inspect coolant
tubing and connections for leaks and fix, if
necessary.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Always verify proper operation
after servicing.
• Brazed Plate Heat Exchanger: Inspect heat
exchanger for leaks and fix, if necessary.
Honda MCHP unit requires periodic inspection by certified
service professional to maintain acceptable performance
and ensure safe operation. Inspection/service procedures
are outlined in unit’s Installation, Operation and
Maintenance Manual. Services are required every 6,000
hours, operating time of unit will directly impact service
interval. Inspections include, but are not limited to:
• Starting Ease
Review maintenance and cleaning procedures as outlined in
Installation, Operation and Maintenance Manuals of boiler
and Honda MCHP before proceeding with procedures below.
Regular service and maintenance by qualified service
agency must be performed to assure safe, trouble-free
operation and maximum efficiency. Service or inspect
system at least once every 12 months.
• Oil Leakage
14.1 Beginning of Each Heating Season
• Engine Coolant
Schedule annual service by freewatt PLUS dealer or
certified service agency, to include:
• Examine boiler as described in annual inspection,
service procedures outlined in boiler Installation,
Operation and Maintenance Manual. Inspections
include, but are not limited to:
• Breather Tube
• Condensate and Condensate Drain
• Air Cleaner Element
• Intake Air and Exhaust Piping
• Ventilation Air Inlet and Outlet
• Heat Exchanger’s Flue Passageways
• Coolant Tubing and Connections
• Burner
• Electrical System and Connections
• Combustion Fan
• Communication System and Connection
• Circulator
• Replace:
• Electrical Connections
a.
b.
c.
d.
• Condensate Drain
• Intake Air and Exhaust Piping
• Boiler Operation (Safety, Temperature Rise & Burner
Ignition)
Engine Oil and Drain Washer.
Engine Oil Filter Cartridge.
Spark Plugs.
Adjust Clearance Between Tappets.
MCHP Owner’s Manual outlines specific maintenance
intervals (6,000, 12,000, 18,000 & 24,000 hours) and
requirements for each interval. Maintenance should be
performed by service professional to maintain performance
and ensure safe operation of your Honda MCHP.
• Examine control module/HI Module per annual
inspection/service procedures outlined below:
• Control Module: Using laptop computer or PDA
check control module’s functions. Detailed
procedures found in MINT Tool Supplement.
• Communication/Electrical Connections: Inspect
connections to and within Control Module and HI
Module. Verify they are secure and connected
properly.
• Bypass Switch: Place CHP Mode Switch in OFF
position and operate boiler to verify CHP mode
switch is working properly. Place CHP mode switch
in ON position after verification is complete.
41
14 - MAINTENANCE AND CLEANING
14.2
1. Shutdown Procedure:
Draining Procedure
A. Preferred Method: Set thermostat to OFF by
pressing Mode button until display reads OFF. Turn
SYSTEM POWER switch to off after shut down cycle
of approximately three minutes is completed.
B. Emergency Method: Turn SYSTEM POWER and
BYPASS switch to OFF. MCHP may overheat and
flash error message due to coolant pump turning
off.
It may be necessary to drain system during maintenance
operations. Follow procedure below:
NOTICE
Use caution while servicing and disposing of coolant
in proper manner. MCHP coolant is 50/50 ethylene
glycol solution and is toxic. Glycol is specially
formulated with bittering agent to discourage
ingestion.
2. Inspect coolant connections on MCHP unit and integral
3.
4.
5.
Wait for coolant to cool down if system has been
operating. Several hours may be necessary to cool
coolant fluid to safe working temperature.
6.
Use precautions while collecting coolant. Coolant
may flow at high rate due to pressure in system.
Verify tubing loops are open to prevent any vacuum
effect to adversely impact draining operation. If
coolant has under 24,000 hours of operation and is
clean, reuse when refilling system.
It is recommended to evacuate lines with aid
of LOW pressure (under 5 psi) compressed air.
Alternatively, hand pump can be used.
42
brass drain valve when coolant achieves a safe working
temperature.
Place towel under drain valve.
Verify valve’s position is OFF, slowly remove drain cap.
Connect short hose to drain valve and extend to
coolant container pan.
Open valve and evacuate coolant from system.
Coolant tank’s cap may need to be taken off to remove
vacuum.
15 - DETAILED SEQUENCE OF OPERATION
43
15 - DETAILED SEQUENCE OF OPERATION
44
15 - DETAILED SEQUENCE OF OPERATION
• Operate domestic water heating zone without
causing unacceptably high temperature in MCHP
coolant. Boiler burner operation is disabled
immediately upon end of call for heat.
15.1 MCHP Operation:
• freewatt PLUS System is designed to preferentially
provide heat to home and indirect water heater by
operating MCHP unit.
• For zones with room thermostats wired directly to
ECR relay control or any ECR expansion relay control,
operation of MCHP and boiler burner will terminate with
end of heat call (either from initiating zone or any other
zone.)
• Boiler is operated as supplemental heat supply as
needed to maintain comfort.
• Preferential operation of MCHP is achieved by
allowing MCHP to operate at times when thermostat
does not specifically call for heat, but, based on
outdoor temperature, continuing need for heat can
be established. Homeowner should expect MCHP to
“run” longer and more often than boiler, even when
thermostat may not indicate call for heat.
• Call for heat by Aquastat of indirect water heating
tank Zone 1, when Zone 1 is configured for heating
of domestic water. Water heating zone pump starts,
MCHP operates, boiler burner is enabled to maintain
temperature programmed as domestic water heating
temperature (freewatt PLUS boiler parameter 1 +
33). Boiler burner is disabled and MCHP continues to
operate when Aquastat is satisfied, until freewatt
control module has determined it is not possible to:
• freewatt PLUS System designed to maintain close
control of building temperature. Variations in room
temperature should be less than traditional thermostats
with operating temperature dead band.
• Operate Smart Zone without exceeding small
temperature rise above Smart Zone spacing heating
setpoint or
15.2 freewatt PLUS System Response to Heat
Demands:
• Operate domestic water heating zone without
causing unacceptable high temperature in MCHP
coolant.
freewatt PLUS System heating function is activated by
call for heat from thermostat or aquastat on indirect water
heater. Does not directly respond to electrical power demands in home. Response of freewatt PLUS System to
heat calls follows:
• Upon demand for heat from any space heating
zone, hydronic water flow to zone “radiators” is
initiated, MCHP unit is started and boiler operation
is enabled. Burner in boiler will fire as necessary to
maintain current required hydronic loop temperature
as determined by programmed outdoor reset control
of boiler. Boiler initially fires at lowest input rate
and modulates to higher levels as determined by
temperature response of hydronic loop temperature.
• MCHP coolant temperature is monitored internally and
reported to freewatt control module. MCHP operation
terminates automatically by freewatt control module
and disabled for period of time ranging from 15
minutes to three hours if MCHP coolant reaches 185°F.
Occurs when current target temperature of boiler
control is high (about 160° F or above.). Can also
occur if boiler temperature boost mode is not disabled
as recommended. In either case, freewatt control
module logic takes into account frequency which 185°F
coolant temperature is reached and determines how
long to disable operation of MCHP unit. Operational
logic limits number of times MCHP is started and
stopped in presence of high hydronic loop temperature.
• Smart Zone operation of MCHP unit, initiated by call for
heat, will continue beyond specific call for heat from
Smart Zone thermostat as long as outdoor temperature
sensor indicates general need for heating of building
(i.e. outdoor temperature about 55° F). Boiler
operation is disabled immediately at end of call for heat
from Smart Zone Thermostat. Operation of MCHP unit
is terminated only when there is small temperature
rise above current set temperature of Smart Zone
Thermostat.
• Default setup of freewatt control module provides 30
minute priority to DHW heating when DHW jumper is in
place. Priority action pertains to achieving satisfaction
of indirect water heater aquastat (not virtual heat
call operation of MCHP unit.) Priority action can be
deactivated by using Mint Service Tool.
• For other heating zones with room thermostats wired
directly to freewatt control module, operation of
MCHP will continue until initiating zone, or any new
heat demand zone is satisfied and freewatt control
module determines it is not possible to either
• Operate Smart Zone without exceeding small
temperature rise above Smart Zone setpoint or
45
15 - DETAILED SEQUENCE OF OPERATION
15.3 Achieving Best freewatt PLUS System
Performance
• Select Smart Zone and configure if necessary, so it
represents at least 25% of total heat demand of home.
Homeowner dollar, carbon dioxide emissions, and energy
saving with freewatt PLUS is maximized by adjusting
operating parameters of boiler and thermostat to achieve
maximum preferential operation of MCHP unit (and
minimum firing of boiler).
Following steps will help in maximizing benefit of freewatt
PLUS System.
• Set top target temperature of boiler reset operating
temperature control (parameter 4) at lowest possible
temperature that will meet heating needs of home
on coldest days of year. Recommended maximum
top target temperature is 160°F per Commissioning
Procedure. Setting top target temperature greater than
160°F will significantly reduce operation of MCHP unit
and resulting electric power production. Set target
temperature lower if possible.
• Set individual zone thermostats so Smart Zone set
point is about (1 or 2 degrees) above other zones in
home will help maximize production of electricity by
freewatt PLUS System.
• Set freewatt PLUS boiler parameter 11 to zero per
Commissioning Procedure. Turns off temperature boost
feature of boiler control. If occupants are dissatisfied
with response of heating system to thermostat set
point adjustments, consider altering outdoor reset
curve, using Parameters 4, 5, 6, and 7 before adjusting
Parameter 11 to non-zero setting. Keeping parameter
11 at zero is beneficial when there are heating zones
that do not have critical heating comfort requirements
but will produce nearly constant call for heat. Near
constant call for heat can result from heating zone
being “under radiated” or heat convectors being closed
off. freewatt PLUS performs best when all heating
zones have appropriate amount of radiation.
• Set Aquastat on indirect water heater no greater than
125°F.
• Although it is contrary to modern heating system
practice, it is recommended to avoid using setback with
freewatt PLUS System. Using setback will typically
cause Honda MCHP to shut down during setback
hours as thermostat will be satisfied, particularly
during early stages of setback. This reduces MCHP
run hours and power generation significantly, thus
reducing electric bill savings and cost effectiveness
of freewatt system. Coming out of setback
requires the freewatt boiler to run more to make
up additional heat demand. Setting thermostat at
a constant temperature and leaving in there will
maximize comfort, power generation and electric bill
savings. Set it, forget it, and save.
46
16 - TROUBLESHOOTING
• Only trained, experienced service technicians
should service control systems. Follow “Sequence
of Operation” for normal light off sequence after
troubleshooting.
! WARNING
Fire, explosion or risk of shock hazard may cause
severe injury or death. Do not attempt to modify
characteristics of this home heating appliance in any
way.
• If two consecutive controls appear to fail or appear
defective, control is probaly not defective. Another
problem may give appearance controls are defective
or fail (for example, electrical short burning out
transformer).
16.1 Troubleshooting Tools
• Voltmeter with settings to check: 240 VAC, 120 VAC,
24 VAC and 12 VDC;
• Check coolant tubing extending from Honda MCHP
to Hydronic Hybrid Integration Module is securely
connected and not plugged or damaged.
• Continuity Tester;
• Contact Thermometer; (Non-Contact Infrared
Thermometer)
• Check coolant operating temperature. Using MINT
tool, confirm coolant entering MCHP unit is in range of
152-154° F. Check coolant tank in Hydronic Hybrid
Integration Module verify filled to above MIN. level line.
(Preferred level is just below MAX line.)
• Manometer with range of 0 to 20” of water column.
• Laptop Computer Loaded with MINT Software Tool.
16.2 Initial Service Checks
• Verify appropriate 120 VAC and 240 VAC circuit
breakers at main service panel are ON. Check outdoor
disconnect switch, where applicable, is ON.
• Verify 240 VAC and 120 VAC electric service switches
are turned ON.
• Check for 120 VAC (minimum 108 VAC to 132 VAC) to
system.
• Check for 240 VAC (minimum 216 VAC to 264 VAC) to
Honda MCHP.
• Verify thermostat in Heat Mode.
• Verify thermostat is calling for heat on system control.
If not, inspect thermostat connections to ensure proper
contact.
• Verify external safety controls are installed and working
properly.
• Verify natural gas supply valve is open at gas meter,
manual shutoff valves and gas control valve. Gas
pressures are maximum of 10” w.c. (natural gas)
or 14” w.c. (propane) with no flow or with system
operating and minimum of 4” w.c.(natural gas) or 10”
w.c. (propane) with gas flowing at maximum firing rate
of freewatt PLUS boiler (verify during system startup
with boiler and Honda MCHP operating simultaneously).
• Check wire connectors at control module, boiler control
and Honda MCHP are securely plugged in or connected.
• If any component does not function properly, verify it is
correctly installed and wired before replacing it.
• Static electricity discharge can damage control module
and boiler control. Touch metal surface to discharge
static electricity before touching either control.
• The control module and boiler control cannot be
repaired. If either or both controls malfunction, the
control unit must be replaced.
47
16 - TROUBLESHOOTING
16.3 Accessing freewatt PLUS System
Operational Data and Codes
! WARNING
Electrical shock hazard may cause serious injury
or death. Avoid touching live electrical contacts.
Service shall be performed by trained, experienced
service technician.
Multiple means of accessing hydronic freewatt PLUS
System operational data and error codes for purposes of
troubleshooting.
• Observe and count number of flashes of red “Service
Required” LED on front of freewatt control module.
See Table 16-1 “Alarm Codes for Service Required LED
on freewatt control module”.
! WARNING
WHAT TO DO IF YOU SMELL GAS
Do not try to light or start any appliance.
Do not touch any electric switch or use any phone in
the building.
Immediately call your gas supplier from a neighbor’s
phone. Follow gas supplier’s instructions.
If you can not contact your gas supplier, call fire
department.
• Observe flash rate of green LED on front of freewatt
control module labeled “Combined Heat and Power”.
(See Table 16-2 “Alarms Codes for Combined Heat and
Power LED on freewatt control Module”.
• Observe status (lighted or not) of 10 LEDs on
freewatt control board in freewatt control module.
(Remove cover to observe.) See Table 16-3.
• Read boiler operation error code on freewatt PLUS
boiler electronic front panel per freewatt PLUS Boiler
Control Manual and Troubleshooting Guide.
! WARNING
• Use MINT software on portable computer connected to
freewatt control module to display freewatt PLUS
operating data and error codes for freewatt PLUS
System and Honda MCHP unit per MINT software
Manual.
Fire or explosion hazard. Use only your hand to
turn gas control knob. Never use tools. If knob will
not turn by hand, don’t try to repair it. Force or
attempted repair may result in a fire or explosion.
! WARNING
• Remove metal cover of control panel on MCHP (located
upper left side of unit) and read error codes per Honda
MCHP Installation and Operation Manual.
Fire or explosion hazard. If overheating occurs
or gas supply fails to shut off, do not turn off or
disconnect electrical supply to boiler or hydronic
hybrid integration module. Shut off gas at location
external to appliance.
• freewatt PLUS systems operate with RC-1000 HAI
thermostat, note color of thermostat display (red for
fault/alarm condition) and read freewatt control
module error message display. Error messages same
as “Alarm Codes for System Service LED on freewatt
Control Module”.
• Call ECR freewatt PLUS Technical Support
representative.
! WARNING
Fire or explosion hazard. Do not use system if any
part of gas control system (boiler or MCHP unit)
has been underwater. Contact qualified service
agency to inspect system and replace any part of
control system and any gas control which has been
underwater.
48
16 - TROUBLESHOOTING
Hydronic freewatt PLUS System consists of eight major
components:
• Boiler,
• freewatt Control Module,
• Hydronic freewatt PLUS Hybrid Integration (HI)
Module,
• Honda MCHP,
• freewatt HAI Thermostat,
• freewatt Transfer Switch,
• Load Balancing Transformer and
16.4 General Troubleshooting
If
And
Check or repair
No Control module
or HI Module
operation
120 VAC electrical connections
Blown fuse on freewatt
control module circuit board
No boiler operation
Thermostat settings
Check Boiler per freewatt
PLUS Boiler Control Manual
and Troubleshooting Guide
• Coolant Pump
functioning Properly
• APC Universal Transfer Switch
Each major component has its own installation and service
manual outlining troubleshooting information regarding
individual component.
Make corrective action. Turn off power and restart system
to clear error conditions.
Use BYPASS MODE, (CHP MODE OFF) to sustain heating
operation while resolving freewatt control module or
MCHP unit errors or malfunctions.
• Circulators Functioning
Properly
• Air in Coolant Line
Honda MCHP
overheats
• Coolant Line Blocked
• Coolant lines piped
correctly into Honda
MCHP
• Mixing valve setting
No power to
thermostat
No Honda MCHP
operation
Display
is blank
Check Control Module
Connection
Fuse in thermostat 24VAC
Fuse in freewatt control
module
or Faulty wire connection
See MCHP Manual
49
16 - TROUBLESHOOTING
Table 16-1 Alarm Codes for Service Required LED on freewatt Control Module
ERROR
INDICATES
CHECK OR REPAIR
CODE
1. CHP MODE SWITCH IN ON POSITION
2. CABLES AND CONNECTIONS BETWEEN
THE THERMOSTAT AND THE HI MODULE
1
THERMOSTAT COMMUNICATIONS ERROR
3. LOWER FURNACE ACCESS PANEL
INSTALLED
4. IMPROPERLY PROGRAMMED
THERMOSTAT
2
1. CHECK OUTDOOR SENSOR AND CONNECTION OR INTERNAL 20k OHM DEFAULT
RESISTOR
OUTDOOR SENSOR ERROR
1. RESET SYSTEM POWER
3
MCHP COMMUNICATIONS ERROR
4
MCHP DEVICE ERROR (MCHP ASSERTING “FAILURE” STATUS, IE. A HARD ERROR)
5
MCHP DEVICE WARNING (MCHP ASSERTING “WARNING” STATUS, IE. A SOFT ERROR)
6
freewatt PLUS FLASH PARAMETER INTEGRITY CHECK ERROR
7
SYSTEM POWER SWITCH OFF, UNABLE TO ENTER BACKUP MODE (NOTE: NOT DEFINED IN HYDRONIC SYSTEM)
8
MCHP PLACED IN LOCKED MODE BY SERVICE TECH, PREVENTS MCHP OPERATION
9
RESERVED FOR FUTURE USE
10
ERROR CODE 10 NOT USED
11
LOW DWELLING TEMPERATURE. BOILER DOWN OR THERMOSTAT “OFF” BY MISTAKE
12
13
2. POWER TO MCHP
3. CABLES AND CONNECTIONS BETWEEN
HONDA MCHP AND HI MODULE
CHECK HONDA MCHP DIAGNOSTICS
SERVICE REQUIRED
RESERVED FOR FUTURE USE
VIRTUAL WATCHDOG TIME-OUT. AN UNEXPECTED FIRMWARE EXECUTION ERROR
OCCURRED.
14
EXHAUST GAS LEAK SENSOR FAILURE, HONDA MCHP ERROR 39.0 (EX_SENS_FAIL)
15
EXHAUST GAS LEAK SENSOR POWER FAILURE, HONDA MCHP ERROR 39.1,(EX_SENS_POWER_
FAIL)
16
EXHAUST GAS LEAK SENSOR ALARM, COMBUSTION GAS DETECTED, HONDA MCHP ERROR 10.1,
(EX_LEAKAGE_FAIL)
17
NO DC POWER SUPPLY VOLTAGE DETECTED IN BACKUP MODE. (LOAD_PWR_FAULT)
18
DETECTED A freewatt PLUS TRANSFER SWITCH COMMUNICATIONS FAILURE
19
DETECTED A freewatt PLUS TRANSFER SWITCH DEVICE ERROR
20
ERROR CODE 20 NOT USED
21
DETECTED A freewatt PLUS TRANSFER SWITCH STATE ERROR
REPLACE CONTROLLER MODULE
INDICATES A FAULT IN 120V LOAD
CIRCUIT
Check fTS communications cable
see freewatt transfer switch IOM
see freewatt transfer switch IOM
22
RESERVED FOR FUTURE USE
23
DETECTED A freewatt PLUS TRANSFER SWITCH CONTACTOR #1 ERROR
see freewatt transfer switch IOM
24
DETECTED A freewatt PLUS TRANSFER SWITCH CONTACTOR #2 ERROR
see freewatt transfer switch IOM
25
EXHAUST GAS LEAK SENSOR TEST BUTTON PRESSED
26
VOLTAGE DETECTED ON THE freewatt PLUS TRANSFER SWITCH ISLAND NODES (I1 OR I2) IN
BACKUP POWER MODE
27
RESERVED FOR FUTURE USE
28
MISSING L1 OR L2 OF AC POWER (fTS_AC_FAULT)
29-98
RESERVED FOR FUTURE USE
99
VIRTUAL WATCHDOG TIME-OUT OCCURRED 5 OR MORE TIMES. MULTIPLE UNEXPECTED FIRMWARE EXECUTION ERRORS OCCURRED.
50
see freewatt transfer switch IOM
BLOWN FUSE, FAULTY WIRING, UTILITY
FAULT
REPLACE CONTROL MODULE
16 - TROUBLESHOOTING
16.6 Control Board LED Interpretation
Table 16-2
• Observe green LEDs on control board by removing
cover of freewatt Control Module.
• Control Board LEDs are valid only in Combined Heat
and Power Mode (CHP Mode switch “ON”). They are not
used when system is in Bypass Mode (CHP Mode switch
“OFF”).
• Do not use Control Board LEDs as indicator of system
status when in Bypass Mode.
Alarms Codes for Combined Heat and Power LED on
freewatt Control Module
Combined Heat Power
LED Status
Condition
Rapid Flash
(~5 per second)
MCHP operation suspended
on detection of high coolant
temperature
Steady ON
Normal MCHP Operation
16.5 MCHP Suspended Mode
Table 16-3
MCHP operation will be suspended if there is detection of
high coolant temperature, indicated by rapidly flashing
Combined Heat and Power LED. MCHP Suspend Mode
prevents MCHP unit from cycling in overheat situation
in which it cannot run. Condition may be due to boiler
temperature set higher than recommended, improperly
commissioned system, or high aquastat setting on indirect
hot water tank. Perform following tasks if suspend
condition is encountered.
• Check boiler parameters. Hydronic freewatt system
has maximum recommended design water temperature
of 160° F. Suspend mode will occur and effect overall
MCHP runtime and power generation, if boiler water
temperature is higher than 160° F.
Controller Board LED’s indicate:
LED ON
Z1
Zone 1 circulator ON
Zone 1 circulator OFF
Z2
Zone 2 circulator ON
Zone 2 circulator OFF
Z3
Zone 3 circulator ON
Zone 3 circulator OFF
Z4
Zone 4 circulator ON
Zone 4 circulator OFF
Z5
Zone 5 circulator ON
Zone 5 circulator OFF
Z6
Zone 6 circulator ON
Zone 6 circulator OFF
MCHP ENB
• Check aquastat on indirect water tank is set no
higher than 125° F. MCHP may not run while boiler
is satisfying indirect hot water tank, if aquastat must be
set higher for hot water recovery.
• Ensure flow is present in coolant loop and hydronic
loop (check for working pumps).
LED OFF
MCHP enabled
MCHP disabled
X1X2
Relay XX end switch
relay closed
Relay XX end switch
relay open
MyEND
freewatt Control
Module closed either
DHW or CH input to
boiler, requesting
boiler operation
freewatt Control
Module not requesting
boiler operation
PUMP1
24 VDC coolant pump
24 VDC coolant pump
in HI Module energized not energized
PUMP2
120 VAC Hydronic
circulator connected to
HI Module energized
through external relay
switch
120 VAC Hydronic
circulator not
energized
PUMP3
Not used
Not used
• Ensure system is properly commissioned per
Hydronic Commissioning Procedure.
NOTE: One or more zone circulators may be activated
without specific call for heat by room thermostats or DHW
aquastat consequence of control logic anticipating heat demand and attempting to maximize MCHP run time.
51
16 - TROUBLESHOOTING
16.6 freewatt PLUS System Fuses
! WARNING
Do not jumper fuse. Replace specified as listed.
Failure to comply could result in severe personal
injury, or death.
! WARNING
Label all wiring prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Disconnect power to system
before servicing. Failure to comply could result in
severe personal injury or death.
NOTICE
Check control module fuses before replacing control
module or other major component (pump, motor,
etc.). Blown fuse may prevent system control
module or other components from operating.
NOTICE
On board fuses are not available from ECR
International. Service technicians should provide
fuses for freewatt PLUS service from local suppliers.
Refer to Table 16-4.
Table 16-4 freewatt PLUS System Fuses
Location
QTY
Amp Voltage
Spares
Shape
Size
Control Module (Control board, GDB Fuse)
1
2
250
0
Cylinder
5mm X 20mm
Boiler (Control Board F1, Lower RH Corner)
1
5
250
2
Cylinder
5mm X 20mm
Boiler (Control Board F3, Middle Right Side)
1
4
250
2
Cylinder
5mm X 20mm
MCHP*
1
1
650DC
0
Cylinder
6.35mm x 32mm
MCHP *
2
20
600AC
0
Cylinder
10.3mm x 38.1mm
APC UTS6H Control Board
(Use Littlefuse KLKR15 or eqiv.)
6
15
600AC
0
Cylinder
10.3mm x 38.1mm
* Refer to MCHP Shop Manual
52
17 - PIPING AND WIRING SCHEMATICS
17-1 Piping Schematic Symbols
CIRCULATOR
(With Isolation Flanges)
AIR SEPARATOR
BALL VALVE
3 WAY MIXING
VALVE
PRESSURE
REDUCER VALVE
HEAT EXCHANGER
BACKFLOW PREVENTER
ZONE VALVE
FLOW CHECK VALVE
EXPANSION TANK
BOILER DRAIN VALVE
53
17 - PIPING AND WIRING SCHEMATICS
17-2 Primary/Secondary Piping With Zone Valves and Domestic Hot Water Priority Circulator
54
17 - PIPING AND WIRING SCHEMATICS
17-3 Primary/Secondary Piping With Circulators and Domestic Hot Water Priority Circulator
55
17 - PIPING AND WIRING SCHEMATICS
17-4 Primary/Secondary Piping With Hydro-Air Handler and Domestic Hot Water Priority Circulator
56
17 - PIPING AND WIRING SCHEMATICS
17-5 HDJ - 240 VAC Wiring Only
57
17 - PIPING AND WIRING SCHEMATICS
17-6 HDJ - 120 VAC Wiring Only
58
17 - PIPING AND WIRING SCHEMATICS
17-7 HDJ - 120 VAC Wiring - Control Module & Zone Pumps
59
17 - PIPING AND WIRING SCHEMATICS
17-8 HDJ - 120 VAC Wiring - Control Module & Zone Valves
60
17 - PIPING AND WIRING SCHEMATICS
17-9 HDJ - 120 VAC Wiring - Control Module & Hydro Air
61
17 - PIPING AND WIRING SCHEMATICS
17-10 HDJ - Low Voltage Wiring Only
62
17 - PIPING AND WIRING SCHEMATICS
17-11 HDJ Low Voltage Only Wiring - Control Module and Zone Pumps
63
17 - PIPING AND WIRING SCHEMATICS
17-12 HDJ Low Voltage Only Wiring - Control Module & Zone Valves
64
17 - PIPING AND WIRING SCHEMATICS
17-13 HDJ Low Voltage Only Wiring - Control Module & Zone Valves with Expansion Zones
65
17 - PIPING AND WIRING SCHEMATICS
17-13 HDJ Low Voltage Only Wiring - Control Module & Hydro Air
66
17 - PIPING AND WIRING SCHEMATICS
17-14 MCHP Low Voltage Wiring
67
®
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An ISO 9001-2008 Certified Company
www.ecrinternational.com
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