Specifications

38
should not less than about 25% of total for building).
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 confi gurations
with ECR ARM-6P or AZ-6CP zone relay controls and separate
cooling 24 VAC transformer (additional to freewatt PLUS
System transformer) .
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 confi gurations 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 fl ow 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.
Figure 12-9 Generator Warning Label
12 - ELECTRICAL WIRING & CONNECTIONS
Figure 12-10 MCHP Line Voltage Connections