Girard Products GSWH-1M Manuel De L'utilisateur page 11

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Understanding How the Girard Tankless Water System Works
• The presence of a flow restrictor in the hot water line may limit your ability
to reach a comfortable water temperature. For best results remove the
restrictor in the shower head.
• Purge air out of ALL hot and cold water lines, including outside shower, toilet
and wash machine water lines (if applicable).
• Review operation video at www.greenrvproducts.com, then click OPERATING
TIPS. then click GSWH-1M
In a conventional installation the Girard Tankless Water Heater is connected to:
1. The RV's cold water system deriving its water input from a pressurized (45 psi or greater)
source such as a shore connection or an RV water pump connected to the fresh water storage
tank.
2. The RV's hot water system (i.e. faucets and shower)
3. The RV's LP Gas system capable of supplying its rated BTU requirement.
The Girard Products model GSWH-1M is a new 'induced-draft', tankless water heater
designed specifically for Recreation Vehicles (RV). Its configuration and size are consistent
with the tank based RV water heaters currently in use and is designed for OEM's and after-
market use by the RV industry. A main feature of the GSWH-1M is a Gas Modulation Control
(GMC - see Figure 5), which is installed inside the vehicle. Using the GMC, the heating
capacity of the water heater can be manually adjusted from a minimum of 18,000 BTUs to a
maximum of 36,000 BTUs and the incoming water temperature will rise 20°- 70° (F) based
on the actual Hot water flow and the Gas Modulation Control (GMC) setting.
The Girard Tankless Water Heater heats water while it is being used i.e., on demand. The output
temperature of the water depends on the GMC setting, the inlet water temperature AND the Hot
water flow.
If the water flow is low or reduced and the Gas Modulator Control (GMC) Dial is set
too high, "LIMITING" may occur which is: The Hot water temperature will exceed the
Emergency Cut-Off (ECO) setting of 131 degrees (F) and the burner will shut off. When
the Hot water outlet temperature drops to approximately 110 degrees (F) the burner
will reignite. The End User will experience the Water Heater cycling from Hot water then
Cooler water. To correct this "Limiting/cycling" the Gas Modulation Control (GMC) Dial
needs to be turned counter clockwise and/or increase the Hot Water flow.
IF "LIMITING" OCCURS, TURN THE GAS MODULATION CONTROL (GMC) DIAL
COUNTER CLOCKWISE AND/OR INCREASE THE HOT WATER FLOW.
IMPORTANT!
"LIMITING" Emergency Cut Off (ECO)
P a g e
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