Summary of EW 150
Page 1
Designer’s guide efficiency+ ® water heater 1 5 0 , 0 0 0 – 3 0 0 , 0 0 0 b t u / h r.
Page 2
Dear specifier/project manager, at lochinvar, we have long recognized the importance of innovation to any product or service. Those who enter into business must also accept the challenge of meeting constantly changing needs. The designer’s guide you are now holding has been designed to make it more ...
Page 3
L o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 1 clearances . . . . . . . . . . . . . . . . . . . . . .3 codes . . . . . . . . . . . . . . . . . . . . . . . . .2 combustion & ventilation air . . . . . . . . .3 contaminants . . . . ...
Page 4: Codes
2 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 lochinvar codes the equipment must be installed in accordance with those installation regulations in effect in the local area where the installation is to be made. These must be care...
Page 5: Special Location:
The indoor unit must be installed so that the ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation and service (circulator replacement, control replacement, etc.) units located in a residential garage must be installed so that burners and ig...
Page 6
4 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 the equipment room must be provided with properly sized openings to assure adequate combustion air and proper ventilation, when the unit is installed with conventional venting or sid...
Page 7: Contaminants
L o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 5 i f a single combustion air opening is provided to bring combustion air in directly from the outdoors, the opening must be sized based on a minimum free area of one square inch per 3...
Page 8
6 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 the vent materials and accessories, such as firestop spacers, thimbles, caps, etc., must be installed in accordance with the manufacturer’s listing. The vent connector and firestop m...
Page 9
The vertical termination must be a minimum of 3 feet (0.9 m) above the point of exit in the rooftop. A vertical termination less than 10 feet (3.05 m) from a parapet wall must be a minimum of 2 feet (0.6 m) higher than the parapet wall. The vent cap shall terminate at least 3 feet (0.9 m) above any ...
Page 10: Conventional Venting –
8 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 conventional venting – negative draft size vent material according to the “fan” column of vent sizing tables in the latest edition of the national fuel gas code. “fan” applies to cat...
Page 11
For this type of installation, it is best to use a draft control for each water heater located on the riser between the vent outlet and the breeching – location “a”. When this riser is too short to permit the installation of a control, locate a separate control for each water heater on the main bree...
Page 12
1 0 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 sidewall air inlet the sidewall air inlet cap is supplied in the e+ directaire sidewall vent kit. Each kit includes a sidewall combustion air inlet cap to supply air to a single wa...
Page 13: Direct Venting
This can result in incomplete combustion and potentially hazardous levels of carbon monoxide in the flue products. Combined air inlet points the air inlet pipes from multiple water heaters can be combined into a single common connection, if the common air inlet pipe has a cross sectional area equal ...
Page 14
Horizontal direct vent horizontal direct vent applications require a vent kit which must be supplied by lochinvar to guarantee proper operation. The part number for each kit is listed by unit size. Each kit includes a sidewall vent cap for flue products, a firestop, a combustion air inlet cap and in...
Page 15
Multiple flue outlet caps may be installed side by side, and multiple air inlet caps may be installed side by side, but the 3 foot (0.9 m) radius minimum clearance between air inlet and flue outlet must be maintained. All clearance and installation requirements in this section and the applicable por...
Page 16: Outdoor Installation
1 4 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 outdoor installation units are self venting and can be used outdoors when installed with the optional outdoor vent kit. This kit includes a one piece top cover which replaces the s...
Page 17: Gas Supply
Gas supply safe operation of unit requires properly sized gas supply piping (see table f). Gas pipe size may be larger than the heater connection. An internal gas pressure regulator is required if upstream pressure exceeds 6 oz. (10.5" water column), an intermediate gas pressure regulator, of the lo...
Page 18: Water Velocity Control
1 6 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 lochinvar inlet and outlet water connections for ease of service, install unions on inlet and outlet of the water heater. The connection on the unit marked “inlet” should be used f...
Page 19: Water Treatment
Note: when the unit is installed in canada, it must conform to the csa c22.1, canadian electrical code, part 1, and/or local electrical codes. Note: incorrect piping of the cold water supply to the system will result in condensate formation on the heat exchanger and operational problems. See install...
Page 20
E f f i c i e n c y + ® w a t e r h e a t e r p i p i n g d i a g r a m s.
Page 21
L o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 a1 w a t e r h e a t e r p i p i n g d i a g r a m s piping diagram single heater - single tank building hot water supply lock-temp storage tank drain full port ball valve system pump ...
Page 22
A 2 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 piping diagram single heater - two tanks full port ball valve system pump system relief valve tee elbow union expansion tank check valve thermometer l e g e n d building hot water ...
Page 23
L o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 a3 full port ball valve system pump system relief valve tee elbow union expansion tank check valve thermometer l e g e n d piping diagram two temperature installation - single heater -...
Page 24
A4 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 piping diagram two heaters - single tank full port ball valve system pump system relief valve tee elbow union expansion tank check valve thermometer reducing tee reducing tee l e g ...
Page 25
L o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 a5 full port ball valve system pump system relief valve tee elbow union expansion tank check valve reducing tee reducing tee l e g e n d piping diagram two heaters - two tanks “c” “b” ...
Page 26
Piping diagram multi-stack frame w/ water heaters and storage tank lit0665 a6 l o c h i n v a r d e s i g n e r ’ s g u i d e e f f i c i e n c y + w a t e r h e a t e r 6 1 5 - 8 8 9 - 8 9 0 0 model heater inlet/ manifold number outlet size pipe size ew 150-300 2 ” 3 ”.
Page 28
Lochinvar corporation • 615-889-8900 / fax 615-547-1000 www.Lochinvar.Com ew-dg-03 5m-2/06-printed in u.S.A..