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BULLDOG SpaceKeeper Vertical – Installation Operation Maintenance Manual
© Copyright 2013 CGC Group Inc Installation Operation Maintenance Manual is Subject to Change without Notice- Last Revised Oct 1,
2014
COMMISION & START UP
System Flushing:
Proper system cleaning and flushing is an important aspect of the commissioning and start up
procedure for the units. Ensure the system has been flushed properly. This prevents fouling of the
unit’s heat exchangers. It is common for debris to settle out in areas of the system where there is
low flow or low fluid velocity. This causes nuisance alarms as a result of a fouling heat pump. It is
necessary to flush these units out as they appear to contain debris build up. This is the
responsibility of the contractor and not a heat pump defect.
NOTE: Hydronic coils are not 100% drainable.
System Fluid:
Ensure that system water temperature is within an acceptable range to facilitate start-up (80°F
- 120°F) for cooling and (100°F – 140°F) for heating.
System Water pH:
System water should have a neutral pH balance of approximately 7.5 which will extend the life
of the hoses, heat exchangers, and other water side accessories.
Water Flow Rate:
Open all isolation valves to the unit. Ensure that the entering and leaving fluid temperatures of
the BULLDOG unit in operation are acceptable. There is typically an 8 to 12 degree drop or rise
in temperature, depending on whether the unit is in cooling or heating. Under extreme
conditions, slight variances in the temperature may be noted.
Freeze Protection from water System:
Ensure that freeze protection is provided for the outdoor portion of the loop water system.
Inadequate freeze protection can lead to coil damage.
NOTE: A potential issue may arise during construction where the system fluid loop is drained
after being cleaned, flushed and tested. BULLDOG units will not completely drain and may
hold fluid in the condenser or heating coil. Extensive damage may result to internal
components if the system fluid freezes unless adequate glycol is added.
Remove Air from System fluid Loop:
Air in the system impairs unit operation and can cause erosion in the system piping.
Clean Unit Filters:
Confirm that the unit filters that are being used are clean. This contributes to the proper
operation of the unit by ensuring that there is adequate air flow across the coil.
