Cambridge Air Solutions
14
SA-Series Technical Manual
START-UP INSTRUCTIONS
1. Visual Inspection of Equipment (page 14)
2. Electrical Supply Voltage Verification (page 14)
3. Gas Supply Pressure Verification (page 14)
4. Motor Amp Draw Check (page 15)
5. Burner Manifold Pressure Adjustment (page 15)
6. Minimum Fire Adjustment (page 15)
7. Calibration Check (page 16)
8. Gas Valve Leak Check (page 16)
9. Gas Train Leak Check (page 17)
10. Remote Control Station Check (page 17)
11. Final Heater Preparation (page 17)
After start-up, please complete and fax the SA-Series
Start Up Checklist to the Cambridge Customer Service
Group. Receipt of completed checklist will start your
warranty period from the date of start-up.
IMPORTANT
Read the following instructions carefully. Any
unauthorized modifications to, or deviations from these
instructions will void warranty.
VISUAL INSPECTION OF EQUIPMENT
1. Check for any physical damage from shipping or
installation that could render the heater inoperable.
2. Verify all heater accessories have been properly
installed.
3. Check for loose components.
4. Verify the field wiring, both primary and control,
has been installed according to the Cambridge
wiring diagram, National Electrical Code, and local
electrical codes.
5. Verify that the sediment trap has been installed prior
to all gas controls.
6. Verify the high pressure regulator, if applicable, has
been vented to the outside.
7. Verify that the unions in the gas piping located at
the burner and just external to the heater housing,
are tight.
8. If inlet ducting is utilized, determine the time
required to purge it with four (4) air changes and
select a pre-purge time that will accommodate
this time. Utilize jumper settings on the Multi-
functional PC Board to set the Purge Timer to 2, 4,
8, 16, or 32 seconds, as applicable.
ADJUSTMENT
TIMER
PREPURGE
ELECTRICAL SUPPLY VOLTAGE VERIFICATION
1. Check electrical supply voltage at the supply wiring.
2. Nameplate Volts 115V/1PH (SA250)
208-230V/1PH (SA350)
Actual Volts __________________
IMPORTANT
Do not proceed with start-up unless supply voltage
agrees with nameplate voltage. If supply voltage does
not agree with nameplate voltage, check with your
local agent or Cambridge Air Solutions Customer
Service Group to determine what changes are required.
3. Set transformer jumper for correct voltage (page 37)
GAS SUPPLY PRESSURE VERIFICATION
1. Verify the gas supply pressure complies with heater
nameplate.
2. Nameplate Max Gas Supply Pressure 14" WC
Actual Gas Supply Pressure ________" WC
IMPORTANT
Do not proceed with start-up unless the gas supply
pressure agrees with nameplate pressure requirements.
If the gas supply pressure is in excess of the maximum
pressure indicated, a separate positive shut-off high
pressure regulator must be added upstream of the
heater’s individual low pressure manual shut-off valve.
If a high pressure regulator is needed and has not been
installed, check with your local agent or Cambridge
Air Solutions Customer Service Group to determine the
size and capacity requirements.
