First Co FRR - Manual (Page 5)

5
PROCEDURE 5 - FINAL PREPARATION
Install thermostats and perform any other final wiring required.
Vacuum dirt and debris from cabinet interior and check blower housing and wheel.
Give the blower wheel a quick spin to verify freedom of movement.
Verfiy that drain pan is clear and all connections tight. Pour a pint of water into the pan and see that it drains away.
This can be best done by temporarily removing the air filter and slowly pouring the water through the slots ahead of the
coil. Replace air filter when done.
Make one last air purging of the coil and related piping. Make sure service valves are now open and that motorized valves
are set to automatic.
If equipped with a balance valve in the return line then set it for the required flow.
Check the filter for direction and seating ahead of the coil.
Install and set the return and supply grilles which are shipped separately.
CONDENSATION !!
After installation and prior to startup care must be taken to avoid condensation problems within units which are allowed to
cool down below room air dew point, remain at high humidity and have little or no fan operation.
It can literally rain inside of these cabinets and create havoc if not addressed. Automatic waterflow valves address this issue
and their use is recommended by the manufacturer. They allow the cold water to bypass a coil that is not in use with no air
circulation. Two and three way automatic valves accomplish this task.
If the system has been installed without the benefit of an automatic water flow control valve, constant fan operation or a
positive coil shut off when not in operation, then it is the responsibility of the installing contractor to properly start up the
system in such a way as to avoid any such problem and the buildings engineer’s responsibility there after.
Pour water here
3,4,6,8 blower
shown here
SERVICE
DANGER: Service and maintenance to internal components and wiring must not be performed until the
main disconnect switch is turned off. Failure to do so will result in electrical shock causing personal injury
or death.
PROCEDURE 6 - START UP
Cooling Season
The requirement here is to lower the water temperature gradually while avoiding the introduction of high humidity air into
the building. Generally, here are the steps:
1) In the spring or early summer start chilled water at about 70 degrees Fahrenheit. Set the fan speed control at low to
medium fan speed on all participating fan coils.
2) Make sure the building is closed to outside air circulation.
3) Reduce chilled water temperature at a rate of 2 Fahrenheit degrees per day until design temperature is reached.
Air Filter
The air filter should be cleaned or replaced every 30 days or more frequently if severe conditions exist. Always replace the filter
with the same type as originally furnished.
CAUTION: Never operate unit without a filter or with filter not fully seated. Damage to blower motor or coil
can result. Failure to follow this CAUTION could result in personal injury or product and property damage.
To replace filter, remove return air grille, move filter forward and then lift up and out. Reverse moves to install new
filter.