Lochinvar EW 150, Руководство дизайнера

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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 installation
drawings provided with
the unit for correct
piping. Higher water
temperatures reduce
condensate formation.
Refer to drawings
in Appendix.
•For every elbow and tee in excess of
those shown above, DEDUCT 5 FEET
from maximum allowable straight pipe
in heater-to-tank circulating loop.
WATER TREATMENT
In hard water areas, water treatment should be
used to reduce introduction of minerals into the
system. Minerals in the water can collect in the
heat exchanger tubes causing noise and
inefficient operation. Excessive build-up of
materials in the heat exchanger can cause a
non-warrantable failure.
Acceptable Water Quality Levels
Maximum Water Hardness = 25 Grains
Minimum Water Hardness = 5 Grains
Maximum Total Dissolved Solids = 350 PPM Range of
Acceptable pH = 7.2 to 7.8
Standard production Lochinvar water heaters are
designed to operate free of impurity build-up in the
heat exchanger when properly installed and
operated under the specified water quality
conditions. For installation in areas outside these
parameters, please consult the factory.
WATER FLOW SWITCH
Due to the low water content (between 1 and 6
gallons) of the copper finned tube heat exchanger,
a flow switch is factory installed as a low water
cutoff device on models EW 150 through EW 300.
The flow switch is installed in the outlet piping from
the water heater and wired in series with the
ignition system safety controls. A flow switch is
acceptable as a low water cutoff device on water
heaters requiring forced circulation. It is prudent to
verify acceptance with the local code official.
RELIEF VALVE
This water heater is supplied with temperature
and pressure relief valve(s) sized in
accordance with ASME Boiler and Pressure
Vessel Code, Section IV “Heating Boilers.”
ELECTRICAL REQUIREMENTS
(North America)
The appliance is wired for 120 volts.
All wiring between the unit and field
installed devices shall be made of type
T wire [63°F (35°C) rise].
The pump MUST be wired to run
continuously when unit is firing.
It is recommended that the water heater
and pump be wired on separate circuits
with properly sized breakers.
(TABLE K)
COMMON WATER MANIFOLD PIPE SIZE FOR MULTIPLE WATER HEATER
INSTALLATIONS
NUMBER COMMON MANIFOLD PIPE SIZE (MINIMUM)
OF UNITS EW 100 EW 150-300
1 1
1
/
2
” 2 ”
2 2
”
3
”
3 2
1
/
2
” 3
1
/
2
”
4 3
”
4
”
5 3
1
/
2
” 5 ”
6 3
1
/
2
”
5
”
(TABLE L) – AMP DRAW DATA
MODEL FAN CONTROLS PUMP APPROXIMATE
NUMBER TOTAL AMPS
@ 120 VAC
EW 150-300 1.2 4.0 5.8 11.0
1.
2.
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
17
(TABLE J)
REQUIRED PUMP PERFORMANCE FOR WATER HARDNESS OF 5
TO 25 GRAINS
MODEL GPM FT. HD. AMP HORSE VOLTAGE/
DRAW POWER PHASE
EW 150-300 55 10 5.8 1/4 120/1