Lochinvar CG 120 THRU 400A, Установка, эксплуатация и обслуживание

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Continued manual resetting of high limit control, preceded by
higher than usual water temperature is evidence of high limit
switch operation. The following is a possible reason for high limit
switch operation:
• A malfunction in the thermostatic controls would allow the gas
valve to remain open causing water temperature to exceed the
thermostat setting. The water temperature would continue to
rise until high limit switch operation.
Contact your dealer or service agent if continued high limit switch
operation occurs.
DIGITAL THERMOSTAT
FIGURE 3
ELECTRONIC IGNITION CONTROL
Each heater is equipped with a Honeywell ignition module. The
solid state ignition control, fig.4, ignites the pilot burner gas by
creating a spark at the pilot assembly. Pilot gas is ignited and
burns during each running cycle. The main burner and pilot gases
are cut off during the OFF cycle. Pilot gas ignition is proven by the
pilot sensor. Main burner ignition will not occur if the pilot sensor
does not first sense pilot ignition.
HONEYWELL IGNITION MODULE
S8600M Continuous Re-Try
FIGURE 4
AUTOMATIC FLUE DAMPER DEVICE
All units are equipped with an automatic flue damper that
reduces heat loss during the OFF cycles. The automatic flue
damper drive assembly is a field replaceable part and may
be obtained by contacting your Lochinvar dealer, distributor
or, Parts Department, 300 Maddox Simpson Pkwy, Lebanon,
TN 37090, Phone: 615-889-8900 • Fax: 615-882-2918, email:
parts_team@lochinvar.com, www.Lochinvar.com.
Each automatic flue damper drive assembly is equipped with a
“Service Switch”, as shown in figure 5.
FIGURE 5
The “Service Switch” has 2 positions: AUTOMATIC
OPERATION and HOLD OPEN DAMPER. For normal
operation the switch should be in the AUTOMATIC
OPERATION position.
If there is a problem with the damper the “Service Switch” can
be placed in the HOLD OPEN DAMPER position. When the
switch is placed in the HOLD OPEN DAMPER position the
damper disc will rotate to the open position and the heater
may be used until vent assembly is repaired or replaced. DO
NOT turn the damper disc manually; damage will occur to
the drive assembly if operated manually. Refer to TESTING
DAMPER OPERATION section of this manual for additional
information.
CIRCULATING PUMP
A circulating pump is used when a system requires a circulating
loop or there is a storage tank used in conjunction with the heater.
Refer to the piping diagrams in this manual for electrical hookup
information and install in accordance with the current edition of
the National Electrical Code NFPA 70. For Canada refer to the
Canadian Electrical Code CSA C22.1.
Only all bronze circulating pumps should be used with commercial
water heaters.
Although circulating pumps are oiled and operated by the
manufacturer some circulators must be oiled again before
operating. Please refer to manufacturer’s instructions.
DISHWASHING MACHINE REQUIREMENT
These appliances meet the NSF Standard 5 for sanitary
installations when used with the following leg kits, Part
#9003425205.
All dishwashing machines meeting the National Sanitation
Foundation requirements are designed to operate with water flow
pressures between 15 and 25 psi (103 kPa and 173 kPa). Flow
pressures above 25 psi (173 kPa), or below 15 psi (103 kPa), will
result in improperly sanitized dishes. Where pressures are high,
a water pressure reducing or flow regulating control valve should
be used in 180°F (82°C) line to the dishwashing machine, and
should be adjusted to deliver water between these limits.