Lochinvar COPPER-FIN CW 745 - Manual (Page 12)

10 L o c h i n v a r D E S I G N E R ’ S G U I D E C O P P E R - F I N W A T E R H E A T E R 6 1 5 - 8 8 9 - 8 9 0 0
An outdoor unit should not be located so
that high winds can deflect off of adjacent
walls, buildings or shrubbery causing
recirculation. Recirculation of flue products
may cause operational problems, bad
combustion or damage to controls. The unit
should be located at least 3 feet (0.91m)
from any wall or vertical surface to prevent
adverse wind conditions from affecting
performance.
Multiple unit outdoor installations require
48
” (1.22 m) clearance between each vent
cap. The outdoor cap must be located 4
feet (1.22 m) below and 4 feet (1.22 m)
horizontally from any window, door,
walkway or gravity air intake.
The combustion air inlet of the outdoor cap
must be located at least one foot (0.30 m)
above grade and above normal snow
levels. The water heater must be at least 10
feet (3.05 m) away from any forced air inlet
and at least 3 feet (0.91 m) outside any
overhang.
Do not install in locations where rain from
building runoff drains will spill onto the
water heater.
Lochinvar must furnish an outdoor vent kit
in accordance with CSA international
requirements. Each kit includes the flue
outlet/combustion air inlet, assembly, gasket
and pump cover.
Freeze Protection-
Outdoor Installation
A snow screen should be installed to prevent
snow and ice accumulation around the
appliance or its venting system.
If for any reason the unit is to be shut off:
(a.) Shut off water supply.
(b.) Drain unit completely.
(c.) Drain pump and piping.
If freeze protection is not provided for the
system, a low ambient temperature alarm or
automatic drain system is recommended.
GAS SUPPLY
The gas pressure regulator supplied is for
low pressure service. If upstream pressure
exceeds 6 oz. (10.5" water column), an
intermediate gas pressure regulator, of the
lock up type, must be installed.
The gas line should be a separate line
direct from meter, unless the existing
gas line is of sufficient capacity. Verify
pipe size with your gas supplier.
A trap (drip leg) should be provided in the
inlet gas connection to the water heater.
Lochinvar
(TABLE C) - OUTDOOR VENT KIT PART NUMBERS
MODEL
NUMBER PART NUMBER
CW 495 ODK3023
CW 645 ODK3024
CW 745 ODK3024
CW 986 ODK3046
CW 1256 ODK3047
CW 1436 ODK3047
CW 1796 ODK3048
CW 2066 ODK3048
1.
2.
3.