Sterling QVSD - Manual (Page 12)

12
FAN TIME DELAY CONTROL (OPTIONAL)
Leads from the fan time delay control are factory wired to
t h e j u n c t i o n b ox ( w h e n o r d e r e d a s a n o p t i o n a l
component). The fan time delay control is a time delay
relay (approximately 45 seconds ON, 65 seconds OFF).
The fan time delay control is rated at 17 amps.
NOTICE: The start-up fan delay should not exceed 90
seconds from a cold start.
IMPORTANT: For all wiring connections, refer to the
wiring diagram shipped with your unit (either affi xed
to the side jacket or enclosed in the installation
instructions envelope). Should any original wire
supplied with the heater have to be replaced, it must
be replaced with wiring material having a temperature
rating of at least 105°C.
Should any high limit wires have to be replaced,
they must be replaced with wiring material having
a temperature rating of 200°C minimum.
POWER VENT POSITION
Units are shipped from the factory set up for horizontal
venting. To convert the power venter for vertical or
opposite side venting, remove the shipping support
bracket, and follow this procedure:
1. Hold power venter motor in position.
2. Remove the three Phillips-head screws from the
motor adaptor plate.
3. Remove the three screws which connect the
power venter stack to the power venter housing.
4. Rotate the power venter housing to the desired
position.
5. Replace screws accordingly.
NOTICE: The motor, pressure switch, and junction
box bracket MUST remain located as shipped
from the factory. Rotate only the blower housing!
If the power venter housing is to be moved to the
right horizontal position, the junction box must be
rotated 90 degrees CCW to clear the connection.
To do this, remove all wires, conduit and conduit
connector from the junction box, noting location
of wires. Move box, using holes provided. Move 7/8
inch plug from bottom of box to side. Reconnect all
wires according to the unit’s wiring diagram.
COMBUSTION AIR INLET SYSTEM PIPING
Never operate duct furnaces
without combustion air and fl ue gas piping in
place, or severe personal injury or death may
occur!
CARBON MONOXIDE!
Your venting system must not be blocked by any
snow, snow drifts, or any foreign matter. Inspect
your venting system to ensure adequate
ventilation exists at all times! Failure to heed
these warnings could result in Carbon Monoxide
Poisoning (symptoms include grogginess,
lethargy, inappropriate tiredness, or flu-like
symptoms).
1. The combustion air system installation must be in
accordance with the latest edition of National Fuel
Gas Code-NFPA 54, ANSI Z223.1 National Fuel Gas
Code. In Canada, installation must be in accordance
with CSA-B149.1 “Installation Code for Natural Gas
Burning Appliances and Equipment” or CSA-B149.2
“Installation Code for Propane Burning Appliances
and Equipment”.
2. A Breidert Type L or Fields inlet cap furnished by the
customer, must be installed at the termination point
of the combustion air system, Figures 8 & 9.
NOTICE: The top of the cap is to be no less than 12
inches from the top of the exhaust vent cap. See
Figures 8 & 9.
3. Each duct furnace MUST have its own combustion
air system. It MUST NOT be connected to other air
intake systems.
4. Use single wall pipe constructed of 26 gauge
galvanized steel, or material of equivalent durability
and corrosion resistance for the combustion air
inlet system. For installations in Canada, use pipe
constructed from .025 inch thick aluminum or 0.018
inch thick steel.
Never use a pipe of a diameter
other than that specifi ed in Table 1, (“D” dia. fl ue
opening)! Never use PVC/ABS or other non-
metalic pipe for venting! To do so may result in
serious damage to the unit, or severe personal
injury or death!
INSTALLATION (Continued)