PATH freewatt HDJ, Installation, Operation & Maintenance Manual, Page: 35 / 68

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Route 120 VAC power wiring from service switch to ECR •
AR822-II and attach to 120 VAC power terminals.
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.
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.
Confi gure 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.
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 specifi c 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 fi rmware setting in freewatt control module accessible
via MINT software. Default setting is priority ON when DHW
enabled.
Figure 12-4 Control Module Confi guration DHW or
CH Jumper
Figure 12-2 Boiler 120 VAC Connections
(Refer to Electrical Schematic)
Figure 12-3 Control Module 120 VAC
Connections
12 - ELECTRICAL WIRING & CONNECTIONS