Technical Manual

1 1 Technical Manual Model: GSWH-2 Features: Demand Tankless Water Heater LP Gas / Induced Draft Constant Outlet Temperature Linear Gas Control Valve Electronic Gas Modulation Microprocessor Controls Operation Functional Tests Troubleshooting Service and Maintenance Service must be performed by a certified installer, service agency or gas supplier. This water heater is certified for installation in Recreation Vehicles (RV s) and is not for use in Marine or Space Heating Applications. For service and spare parts: Girard Products LLC 2515 Lombardy Dr.

2 Goshen, IN 46526 866-559-1221 Girard Products LLC, 1361 Calle Avanzado, San Clemente CA 92673 U S A Patent Pending 2 TANKLESS WATER HEATER - Model GSWH-2 Use with U ni ve r s a l LPG only. CONSUMER SAFETY WARNING! Shut off all gas appliances and pilot lights when refueling. Turn gas OFF at the LP tank when vehicle is in motion. This disables all gas appliances and pilot lights. Gas appliances must never be operated while vehicle is in motion. LP tanks must be filled by a qualified gas supplier only. Should overheating occur, turn gas OFF at the LP tank and turn the operating switch to the OFF position.

3 In a conventional installation the Girard Tankless Water Heater is dependent on and connected to: 1. Input Water flow: 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 RV s fresh water storage tank. A steady water flow (no pulsating) w i l l ensure a consistent temperature and performance. Water Pressure regulators are commonly recommended but they often decrease water flow to unacceptable levels. Water filters are highly recommended to keep sediment out of the plumbing system but the need to be maintained or they can restrict water flow.

4 Winterization by-pass kits are not recommended in a tankless water heater systems. The can cause a number of plumbing issues that will affect the operation of the water heater. City water connections at RV parks can have low or varying water pressure. If this condition occurs and cannot be resolved, then we recommend filling the fresh water tank and using the onboard water pump. 2. Output Water flow: The RV s hot water system ( faucets and shower). Purge all air from the plumbing system using both the water pump and city water source. Air in the plumbing can cause intermittent heating operation errors.

5 Pressure is important but actually water flow is critical to the operation of a tankless water heater. The longer the water stays in the water heater the hotter it will become. The water flow is dependent on the plumbing and fixtures of the RV. The length of plumbing, the amount of elbows and the restrictions in the faucets and show heads. Experience has shown us that the average RV water flow is between 1 and Gallons per Minute. This water flow will give you the optimal operation of the water heater. The water heater is equipped with a water control valve to help maintain this optimal water flow especially in winter conditions where input water temperatures below 45 degrees the.

6 The water heater is shipped with the water control in the maximum flow setting. 3 3. LP Gas System: The RV s LP Gas system capable of supplying its rated 42,000 BTU requirement. The Girard Products model GSWH-2 introduces a new generation of smart 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 R V I n d u s t r y . L P s y s t e m i s s u e s c a n o c c u r t h a t c a n a d v e r s e l y a f f e c t t h e o p e r a t i o n o f t h e w a t e r h e a t e r s o i t i s i m p o r t a n t t h a t t h e L P s y s t e m i s m a i n t a i n e d.

7 G a s p r e s s u r e d r o p t e s t r e q u i r e m e n t s v a r y f r o m s t a t e t o s t a t e b u t t h e R V I A r e g u l a t i o n st a t e s t h a t g a s s y s t e m s h o u l d maintain 8 WC f o r 3 m i n u t e s . L P t a n k a n d b o t t l e s m u s t b e p u r g e d c o r r e c t l y w h e n fi l l e d, e s p e c i a l l y u p o n t h e f i r s t f i l l, t o e n s u r e t h a t a l l o f t h e a i r h a s b e e n e l i m i n a t e d f r o m t h e L P c y l i n d e r . I f t h i s i s n o t p e r f o r m e d g a s a p p l i a n c e s w i l l n o t w o r k o r n o t p e r f o r m a s r e q u i r e d.

8 W h e n t h e c y l i n d e r s a r e n o t f i l l e d p r o p e r l y w e o ft e n s e e i n s u f f i c i e n t t e m p e r a t u r e r i s e s f r o m t h e w a te r h e a t e r . Gas pressure of 11 WC is the recommended minimum pressure for the proper operation of the water heater. This test must be p e r f o r m e d w i t h a m i n i m u m o f h a l f t h e g a s a p p l i a n c e s o p e r a t i n g. Cold weather conditions will affect the output BTU s of th e L P c y l i n d e r. T h e s m a l l e r t h e c y l i n d e r t h e l e s s o u t p u t c a n o c c u r.

9 D e b ri s a n d a b u i l d-u p o f o i l i n t h e L P p l u m b i n g c a n r e st r i c t g a s fl o w t o t h e a p p l i a n c e s . 4. 12 VDC Power: The RV s 12 VDC electrical power system. Proper 12 VDC and ground is required for proper operation of the water heater. Low voltage or bad voltage will cause non-operation or failure of the water heater. The water heater will not function when input voltage drops below 10 VDC. When this happens a red LED will illuminate on the water heater control board. Over the years we have seen a drastic improvement with power converters and inverters.

10 The poor power output of an older linear style converter can cause issues with modern electronics. If using this water heater with older converters we recommend wiring through the battery or on the filtered side of the converter so the battery can act like a capacitor and filter the voltage. Understanding How the Girard Tankless Water System Works The Water Heater s microprocessor based controller (Control Board) receives from electronic sensors the data it needs to decide each step of the Model GSWH-2 operation. 1. The User Control Panel (UCP) displays each phase of the Water Heater s operation and receives from the user the operational parameters desired: ON/OFF to activate Desired outlet temperature 2.