Reflect-O-Ray
®
EDS-4DI & EHS-4DI
Installation, Operation & Service
Combustion Research Corporation
Page 35
BURNER SETUP
Each
Reflect-O-Ray
®
EDS-4DI & EHS-4DI
burner
assembly is marked with the input firing rate and fuel
designation on the nameplate. Refer to the following chart
for correct manifold pressure and vacuum readings.
When the system is equipped with fresh air inlet ducting,
the vacuum reading must be read as a differential across
the entire burner. Use the test ports located inside the
burner. See diagram below
NOTE: Gas pressures must be measured with a water or
red oil manometer – DO USE NOT A DIAL GAUGE. All
measurements must be made when this heater and all
other gas burning equipment connected to the gas supply
system are operating at maximum capacity. It should be
assured by test that the gas pressure at the burner inlet is
not greater than the figures given above. Maximum inlet
pressure is 1/2 lb. or 14.0" W.C (3.48 Kpa).
The installer must provide a 1/8" NPT (
3.2mm
) plugged
tapping, accessible for test gauge connection, immediately
upstream of the gas supply.
1. Set thermostat above room temperature.
2. Allow the system to operate for at least twenty (20)
minutes in HIGH FIRE mode for temperature to
normalize before setting the vacuum. Connect
manometer to the pressure ports shown below.
NOTE: The caps must be replaced after the vacuum
has been set.
3. The cold vacuum reading will be approximately 0.75”
to 1.0” W.C. (0.18 to 0.25 Kpa), this will vary
depending on the burner input and radiant tube
length. The HIGH FIRE operating vacuum pressure
is to be set for 0.6” to 0.7” W.C (0.15 to 0.17 Kpa).
The vacuum can be adjusted by opening or closing
the damper downstream of the burner.
4. Lock dampers in place by installing a self-drilling and
taping screw in the handle assembly of the damper.
5. Re-install burner cover and set the thermostat to
desired room temperature.
VACUUM TEST CONNECTIONS
0.6” to 0.7” W.C.
Remove Cap And Attach
Water Manometer Tube
Remove Cap And
Attach Water
Manometer Tube
NOTE:
The System MUST operate in
HIGH FIRE mode for 20
minutes before adjusting and
setting vacuum.