Lochinvar WH 55-399 사용자 설명서

            

Installation & Operation Manual

1.  Boiler system piping:
 

Boiler system piping MUST be sized per the pipe 

 

requirements listed in Table 6A.  Reducing the pipe size 

 

can restrict the flow rate through the boiler, causing 

 

inadvertent high limit shutdowns and poor system 

 

performance.  Flow rates are based on 20 feet of piping,   

 

4 - 90° elbows, and 2 - fully ported ball valves. 

2.  Boiler circulating pump:
 

A Grundfos UPS15-58FC pump for Models 55 - 155 

 

and a Grundfos  UPS26-99FC  pump for Models 199 - 

 

399 will be provided by the factory as the boiler circulation 

 

pump based on 20 feet of piping, 4 - 90° elbows, and 2 - fully 

 

ported ball valves.

Knight wall mount boilers are capable of controlling a 

 

variable speed boiler circulator.  Variable speed 

 

circulators MUST be sized to meet the specified 

 

minimum flow requirements listed in FIG. 6-2 on page 36 

 

at full speed.

3.  Domestic hot water circulating pump:
 

Field supplied.  The pump MUST be sized to meet 

 

the specified minimum flow requirements listed in 

 

 

 

FIG. 6-2.  Consult the indirect water heater operating 

 

guide to determine flow characteristics for the selected 

 product 

used.

 

Field supplied.  Full port ball valves are required.  Failure 

 

to use full port ball valves could result in a restricted flow 

 

rate through the boiler.

 

Field supplied.  Check valves are recommended for 

 

installation as shown in FIG.’s 6-3 through 6-10.  Failure 

 

to install check valves could result in a reverse flow 

 

condition during pump(s) off cycle.

6.  Domestic indirect hot water isolation valves:
  Field supplied.  Full port ball valves are 
 

required.  Failure to use full port ball valves could 

 

result in a restricted flow rate through the boiler.

7.  Anti-scald mixing valve:
 

Field supplied.  An anti-scald mixing valve is 

 

recommended when storing domestic hot water above 

 115°F.

8. Unions:
 

Field supplied.  Recommended for unit serviceability.

9.  Temperature and pressure gauge:
 

Factory supplied.  The temperature and pressure gauge is 

 

shipped loose.  It is the responsibility of the contractor to 

 

install the temperature and pressure gauge on the boiler 

 water 

outlet.

10. Pressure relief valve:
 

Factory supplied.  The pressure relief valve is sized to 

 ASME 

specifications.

11. Boiler purge valve:
 

Factory supplied.  The boiler purge valve is used to 

 

remove entrapped air from the heat exchanger during 

 start-up.

12.  System temperature sensor:
  Lochinvar supplies a system temperature sensor. 

 

 

The sensor is to be installed in the heating loop 

 

downstream from the boiler hot water piping and 

 

heating loop junction.  Typically the sensor will be 

 

located far enough downstream to sense system diluted 

 water 

temperature. 

13. Indirect water heaters:
 

The Knight wall mount boiler may be piped to an indirect 

 

water heater to heat domestic hot water with the space heat 

 

transfer medium.  As depicted in the piping diagrams on 

 

page 38 thru 47, there are two options when utilizing an 

 

indirect water heater.

 

A.  The space heating piping will branch off to flow the 

 

 

space heat transfer medium through a single wall 

 

 

heat exchanger coil inside the indirect water heater.

 

 

 

B.  The indirect water heater is connected to the system 

 

 

supply piping.  A pump controlled by the Knight 

 

 

(wall mount) boiler’s control will regulate the flow of 

 

 

water through the indirect water heater.  The indirect 

 

 

water heater’s temperature will be regulated by the 

 

 

Knight (wall mount) boiler’s control.

 

The Knight wall mount boiler is pre-configured to control 

 

the operation of the DHW pump with Domestic Hot Water 

 

Prioritization programming.  The DHW programming is 

 

designed to control and balance the space heating 

 

demand by switching between DHW and space heating.

 

Lochinvar offers the Squire which is a series of indirect 

 

water heaters. The Squire features a stainless steel vessel 

 

with a single wall stainless steel heat exchanger.

 WARNING The National Standard Plumbing Code, the 

National Plumbing Code of Canada and the 
Uniform Plumbing Code limit the pressure 
of the heat transfer fluid to less than the 
minimum working pressure of the potable 
water system up to 30 psi maximum.  Also, 
the heat transfer fluid must be water or 
other non-toxic fluid having a toxicity of 
Class 1, as listed in Clinical Toxicology of 
Commercial Products, 5

th

 Edition.

14. Y-Strainer:
 

Field supplied.  A Y-strainer or equivalent multipurpose 

 

strainer is recommended at the inlet of the heat exchanger 

 

to remove system particles from older hydronic systems and 

 

protect newer systems.