System Start-up
94 RT-SVX35H-EN
Electric Heat
• Supply Fan (On)
• Variable Frequency Drive (100% Output, if
applicable)
• RTM Occ/Unocc Output (Unoccupied)
• Heat Stages 1 & 2 (On)
Steam or Hot Water Heat
• Supply Fan (On)
• Variable Frequency Drive (100% Output, if
applicable)
• RTM Occ/Unocc Output (Unoccupied)
• Hydronic Heat Actuator (100% Open)
• Open the main steam or hot water valve supplying
the rooftop heater coils.
6. Once t
he configuration for the appropriate heating
sy
stem is complete, press the NEXT key until the LCD
displays the “Start test in __Sec.” screen. Press the +
key to designate the delay before the test is to start.
This service test will begin after the TEST START key is
pressed and the delay designated in this step has
elapsed. Press the ENTER key to confirm this choice.
7. Press the TEST START key to start the test. Remember
that the delay designated in th
e previous step must
e
lapse before the fan will begin to operate.
8. Once the system has started, verify that the electric
heat or the hydronic heat system is operating properly
by using appropriate service technics; i.e. amperage
readings, delta tees, etc.
9. Press the STOP key at the Human Interface Module in
the unit control panel to stop the system operation.
Gas Furnace Start-Up
(Constant Volume & Variable Air Volume
Systems)
It is important to establish and maintain the appropriate
air/fuel mixture to assure that the gas furnace operates
safely and efficiently.
Since the proper manifold gas pressure for a particular
installation will vary due to the specific BTU content of the
local gas supply, adjust the burner based on CO
2
and O
2
levels.
The volume of air supplied by the combustion blower
determines
the amount of O
2
available for combustion,
while the manifold gas pressure establishes fuel input. By
measuring the percentage of CO
2
produced as a by-
product of combustion, the operator can estimate the
amount of O
2
used and modify the air volume or the gas
pressure to obtain the proper air/fuel ratio.
Arriving at the correct air/fuel mixture for a furnace results
in rated burner output, limited production of carbon
m
onoxide, and a steady flame that minimizes nuisance
shutdowns.
Two Stage Gas Furnace
High-Fire Adjustment
1. Use Table 20, p. 75 to program the following system
components for operation by scrolling through the
Human Interface displays;
Gas Heat
• Supply Fan (On)
• Variable Frequency Drive (100% Output, if
applicable)
• RTM Occ/Unocc Output (Unoccupied)
• Heat Stages 1 & 2 (On)
• Tu
rn the 115 volt control circuit switch 4S24 located
i
n the heater control panel to the "On" position.
• Open the manual gas valve, located in the gas heat
section.
2. Once the configuration for the appropriate heating
system is complete, press the NEXT key until the LCD
displays the “Start test in __Sec.” screen. Press the +
key to designate the delay before the test is to start.
This service test will begin after the TEST START key is
pressed and the del
ay designated in this step has
e
lapsed. Press the ENTER key to confirm this choice.
3. Press the TEST START key to start the test. Remember
that the delay designated in the previous step must
elapse before the system will begin to operate.
4. Once the system has started, check the appearance of
the flame through the sight glass provided on the front
of the heat exchanger. In appearance, a normal flame
WARNING
Hazardous Gases and Flammable Vapors!
Exposure to hazardous gases from fuel substances have
been shown to cause cancer, birth defects or other
reproductive harm. Improper installation, adjustment,
alteration, service or use of this product could cause
flammable mixtures or lead to excessive carbon
monoxide. To avoid hazardous gases and flammable
vapors follow proper installation and set up o
f this
p
roduct and all warnings as provided in this manual.
Failure to follow all instructions could result in death or
serious injury.
WARNING
Flammable Vapors!
When connecting to existing gas lines be sure to shut
off the gas supply ahead of connection point. To avoid
explosion or possible fire, always purge all residual gas
from piping before cutting into existing line or
removing threaded fittings. Failure to shut off the gas
supply and remove all gas vapors could result in death
or serious injury.
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