Girard Products GSWH-1 Service Manual page 36

Addendum - Technical Bulletins
TECH BULLETIN 081412-A
GSWH-1M DIAL (GMC) CHANGE & IDENTIFICATION (Continued)
THE 1ST PRODUCTION OF THE GSWH-1M WATER HEATERS AND GMC DIALS ARE
NOT INTERCHANGEABLE WITH ALL FOLLOWING PRODUCTION OF GSWH-1M WATER
HEATERS & GMC DIALS.
THERE ARE APPROXIMATELY 600 OF THE FIRST PRODUCTION GSWH-1M WATER HEATERS.
THEY CAN BE IDENTIFIED BY:
• THE GMC DIAL NUMBERS (ON BACK SIDE OF DIAL – SEE ABOVE)
• AN ORANGE DOT ON THE BACK OF THE GMC DIAL (SEE ABOVE). AN ORANGE DOT ON THE
FRONT OF THE GSWH-1M WATER HEATER (SEE ABOVE).
• AN ORANGE DOT ON EXTERIOR OF GSWH-1M WATER HEATER BOX (SEE ABOVE). IF NO
ORANGE DOTS ARE PRESENT:
REFER TO THE GSWH-1M WATER HEATER SERIAL NUMBER.
APPLICABLE SERIAL NUMBERS: 1GWHM00001 TO 1GWHM00619.
CONTACT GIRARD TECHINAL SUPPORT DEPARTMENT FOR FURTHER ASSISTANCE IN
IDENTIFYING THE 1ST PRODUCTION GMC DIALS AND THE WATER HEATERS.
GSWH-1M TECH BULLETIN 092813-A
New additional 75 Degree C/167 Degree F Limit Switch
On the Girard GSWH-1M Water Heaters from serial number 1GWHM05682 and higher there is
an additional limit switch on the hot water outlet line. This limit switch (75C - 167° F) was added
per CSA requirements to ensure flame shut off if the 55C limit switch (ECO) fails to shut off at
55C (131° F).
TESTING LIMIT SWITCHES
75C has a reset button which can be reset if
flame shut off occurs under 131° F. If the flame
continues to cut off then the 55C limit switch
is defective. You can also jump the 55C limit
switch to check if defective.
NOTE: Both Limit Switches are replaced when
replacing a defective Limit Switches.
75C Limit Switch – White Switch
55C Limit Switch – Black Switch
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