First Co CDXQ Uncased with pump (HW) - Manual (Page 4)

and lines, open both valve number 1
and 2 and close the air bleed valve.
4) Switch the room thermostat to the
"Heat" position and raise the tem-
perature setting to a position approxi-
mately ten degrees above room tem-
perature. The pump should energize
and begin circulating the hot water
through the coil. If the pump is operat-
ing properly and the water temperature
in the water heater has reached the set
point, then the hot water inlet at the fan
coil unit will be hot. If the pump is
running but hot water is not circulating,
open the air bleed valve long enough to
purge any remaining air from the hot
water lines and coil. This will allow the
pump to begin circulating hot water.
5) The water heater thermostat should
be adjusted so that the water tempera-
ture entering the hot water coil is as
close to 140 degrees as possible with
the system energized and operating
long enough for all temperatures to
stabilize.
NOTE: A water heater is designed to
produce hot water. Hot water repre-
sents a serious safety hazard due to
potential scalding. The temperature of
water normally required to provide
space heating (135 to 140 degrees)
may be hotter than certain codes allow
for domestic hot water. An “anti-scald
valve” can be installed in the hot water
piping that would allow the domestic
water to be supplied at a lower tem-
perature than the space heating water.
These can be obtained locally and
should be installed according to the
manufacturer’s installation instruc-
tions.
MAINTENANCE
Fan
The fan should be inspected and
cleaned, in conjunction with mainte-
nance of the motor and bearings. It is
important to keep the wheels clean in
order to avoid imbalance and vibration.
Motor
Check motor connections to ensure
that they are secure and made in
accordance with the wiring diagram.
The blower motor should be cleaned
annually.
Coil
The coils must be kept clean, any
dust or other contaminants which ac-
cumulate on the heat transfer surfaces
interferes with the air flow and impairs
heat transfer. Inspect annually or
more frequently if required and clean
as required.
Filter
The air filter should be cleaned or re-
placed every 30 days or more frequently
if severe conditions exist.
Always re-
place the filter with the same type as
originally furnished.
Drain Piping
The drain should always be:
• Connected or piped to an accept-
able disposal point sloped away
from the unit at least 1/8" per foot
• Checked before summer operation
• Periodically checked during sum-
mer operation
Preventative Maintenance
To achieve maximum performance
and service life of each piece of equip-
ment a formal schedule of regular
maintenance should be established
and maintained.
**MAINTENANCE UPDATES**
For a current copy of the
Maintenance Program log on
to www.firstco.com and
look under "Product Informa-
tion"