Evo HW 79 - Page 12

34000 Autry Street, Livonia, MI 48150 • 800.968.5530 • Fax 734.419.0209 • www.hamiltonengineering.com • LIT91127 REV 3/09
GAS CONNECTION
Measure the gas supply pressure at the pressure nipple [3] of the gas valve. The required gas supply pressure
needed for these appliances to work properly is greater than 4” and less than 14” WC. This pressure range
should be maintained during full gas load on the building where the appliance is installed.
(TABLE 3-3) COMBUSTION & FUEL RELATED ADJUSTMENT TABLE
Please note: All adjustments must be made with the appliance door off, which will lower the CO2 reading
0.2%. See tables above for specic readings.
Changing incoming air temperature may vary the CO
2
setting slightly (~0.2 - 0.6%) after initial set up. This is not
cause for concern or reason to set up again. After one year of operation, set up is required again.
E. SETTING THE MAXIMUM LOAD
A means of sampling the leaving ue gas is built into each model, on all models there is a rubber plug mounted
in the vent connector on top of the appliance. Remove for testing and replace when testing is completed. This
plug MUST be in place during normal operation.
• Press the service button with a pointed object and set the temperature knob on the maximum fan speed as
shown by model in the table below (RPM = display * 100, ex. 060 = 6000).
(TABLE 3-4) FAN SPEED REQUIREMENTS
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Natural Gas CO
2
Natural Gas CO ppm LP Gas CO
2
LP Gas CO ppm
Cover On Cover Off
Approximate, do not use for setup!
Cover On Cover Off
Approximate, do not use for setup!
LOW FIRE 8.5% 8.3% Less than 10 9.6% 9.4% Less than 15
HIGH FIRE 8.8% 8.6% Less than 110 10.0% 9.8% Less than 120
Last 4 digits of serial number
HWD 79, HWH 79, HWH 79.8
First Week Last Week Maximum rpm Minimum rpm
33--07 01--08 5200 1664
02--08 current 6400 1856
Last 4 digits of serial number
HWD 129, HWH 129, HWH 129.8
First Week Last Week Maximum rpm Minimum rpm
24--05 05--06 6500 1625
06--06 48--06 5200 1664
49--06 current 5900 1947
Last 7 digits of serial number HWD 179, HWH 179, HWH 179.8
First Week Last Week Maximum rpm^ Minimum rpm
001-13-06 008-13-06 6000 1920
009-17-06 086-29-06 5800 1856
009-43-07 023-48-07 5800 1856
009-43-07 008-48-07 5600 1680
024-11-08 182-29-08 5600 1736
^ Fan speeds 5800 & 6000 rpm require Hamilton P/N FAN 74313, 5600 rpm requires FAN 74351.