IO-123090-GFW-020113
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©2013 AirMark
The freeze protection sensor is connected to the
FP and R terminals. These are normally open and
will close when the sensor sees 40ºF. The pump
stays ON for a minimum of 30 secs.
The board has a built-in timer which circulates hot
water 6 times a day for 60 secs each time to
prevent the coil from freezing.
Fig.8. Micro-processor control board
Start up
Ensure that motor is pre-loaded with program from
factory.
WARNING
The hot water (hydronic) coil and
all water lines
MUST
be purged of air prior to
starting the pump. Failure to do so could result in
pump damage. Airmark will not be responsible for
any property or personnel damage caused by
failure to follow this instruction.
WARNING
Hot water flowing to the coil
should be in the range of 120º - 180º F. Water at
these temperatures can cause first-degree burns.
Use of proper safety gear while installing or
servicing the equipment is strongly recommended
as is installation of a water-tempering valve (for
water temperatures of above 140ºF) to supply
lower temperature water to fixtures in the house.
N170L series or equivalent should be used.
Connect the hydronic coil to the water heater
system as shown in Fig 9. Use flexible piping and
insulate all pipes. Plumbing must be in compliance
with state or local codes (Code CMR248 in
Massachusetts). The units for hydronic heat have
different top and heater box configurations. This
configuration is not suitable for electric heat.
DO
NOT
try to install hydronic heater in a unit not
equipped for it. Verify connections: hot water to “in”
and cold water to “out”. 7/8” ODstubs are provided
for plumbing connections. Bleed the air flow
system through the bleeder port or optional valve.
Purging The System
1) Open air vent and allow water heater to fill with
water. Close air vent when water heater is full
and all air has been purged.
2) Ignite water heater. Set thermostat on water
heater to 140 degrees.
3) Close the valve on the hot water supply from
the water heater ("A") and open the valve on
the cold-water return to the water heater ("B").
Then open the air vent in the fan coil. Use
bucket or hose to discard water during purging
process at air bleed valve. Purge air
completely from line.
4) Once air is purged, close return valve ("B") and
open supply valve ("A"). Purge the coil and
lines of air completely.
5) After air is purged from the system and filled
with water, open the return valve ("B") and the
supply valve ("A"). Then close the air vent in
the fan coil.
6) Apply power to the fan coil and set the room
thermostat on heat. Raise the temperature
setting to activate the circulating pump
