Airmark GBW Series, Руководство по установке

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Turn on power supply. Set thermostat fan switch to on. Set the cool-
ing indicator to maximum, heating to minimum. System switch may
be on heat or cool. Check slope gauge measurement against appro-
priate air flow chart. Make damper, register and motor speed adjust -
ments to obtain required airflow.
Set thermostat fan switch to auto, system to heat and thermostat
heating indicator to maximum heat. Blower should start and all heat
be energized.
Check air flow using temperature rise method.
17. Electric Heat Controls
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 de-
grees.
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”). 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
7. Check the pump to ensure proper operation. The water inlet of the
unit should be hot if the water temperature in the water heater has
reached the set point. If water is not being circulated through the coil
but the pump is running, then open the air bleed valve in the unit and
purge any air left in the system.
8. Adjust the water heater thermostat so that the water temperature
entering the hot water coils is 120 – 180ºF depending on the amount
of heat required by the structure. This is done with the unit energized
and operating long enough for all temperatures to stabilize.
After all connections are made, start-up and check-up must be per-
Table 16-1. - CFM Delivered at Various External Statics
CFM OUTPUT BTUH
TEMP RISE
=
•
( )
. . 1 08
Note: BTUH output should be computed by 500 x Gallons Per Min -
utes x System Temperature Change = BTUH OUTPUT.
Fig 16-5.
formed before proper evaluation of the entire system can be made.
Make sure that heat anticipator is properly set as noted on thermo-
stat instructions.
Load requirements can vary in each residence and it may be neces -
sary for the installer or homeowner to make slight adjustments to the
heat anticipator setting for longer or shorter cycles. It is recommend-
ed to change the setting no more than plus or minus 0.05 amps at
a time. Greater changes can cause the unit to rapid cycle or remain
on excessively. To properly check the unit’s operation, the installer
should have an electrical current measuring device (0-10 amp Am-
probe, Fluke), air pressure measuring device (0-1.0 in slope gauge),
and a temperature-measuring device (0-200ºF thermometer).
Install the Amprobe to measure blower current, the slope gauge to
measure static air pressure at the units and the temperature device
to measure unit supply and return air temperature. Before taking
measurements, be sure that all registers, grilles and dampers are
open or are set to their proper positions. Be sure that clean filters are
in place. Temperature measuring device must be installed to obtain
average temperature at both inlet and outlet. For outlet, measure
temperature of each main trunk at a location far enough away to
avoid heater radiation and read the average temperatures. Table
16-1 below shows the CFM that should be achieved at various exter-
nal static pressures.
Fig 16-3. Water In
Fig 16-4. - Water Out