Lochinvar
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.
(TABLE C) - OUTDOOR VENT KIT PART NUMBERS
MODEL |
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NUMBER | PART NUMBER |
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CW 495 | ODK3023 |
CW 645 | ODK3024 |
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CW 745 | ODK3024 |
CW 986 | ODK3046 |
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CW 1256 | ODK3047 |
CW 1436 | ODK3047 |
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CW 1796 | ODK3048 |
CW 2066 | ODK3048 |
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
1.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.
2.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.
3.A trap (drip leg) should be provided in the inlet gas connection to the water heater.
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