Carrier VL3A Guide

User’s Information Manual for the operation and
maintenance of Energy Recovery Ventilators
A95044
OPERATINGYOUR ENERGY RECOVERYVENTILATOR (ERV)
Your ERV is designed to operate as an integral part of your total heating and cooling system.
Low Exchange Mode —If the relative humidity inside the building is lower than selected, air exchange would occur with the outside
at high speed. If the relative humidity level inside the building is higher than selected, air exchange would occur with outside at low
speed. This ensures continuous air exchange for constant air quality.
Intermittent Mode —If the relative humidity inside the building is higher than selected, no air exchange would occur, and the system
would turn off. If the relative humidity inside the building is lower than selected, air exchange would occur with outside at high speed.
This mode is ideal for maintaining the proper humidity level when the continuous mode cannot.
PERFORMING ROUTINE MAINTENANCE
1. The motors are factory lubricated for life. Lubricating the bearings is not recommended.
2. The core should be vacuumed every three months to remove dust that would inhibit the energy transfer.
Do not use water. The
core should only be serviced when the outdoor temperature is between 60°F(16°C) and 75°F(24°C) and dry.
NOTE:
If the edges of the core are soft, do not try to service the core. The air passages can be damaged and / or closed off by
handling it or trying to remove it.
3. A dirty air filter will cause excessive strain on the blower motor. The filters in your ERV are washable, and should be cleaned
every 3 months. Use a vacuum cleaner to remove the heaviest portion of accumulated dust, then wash in lukewarm water.
NOTE: Do NOT clean these filters in a dishwasher or dry them with heating appliances as they will be permanently damaged.
Use lukewarm water to clean filters. Replace filters only when they are completely dry.
4. Regularly check the screen on the exterior intake hood and clean when necessary.
WARNING: Before installing or servicing system, always turn off main power to system.There may be more than 1 discon-
nect switch.Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.
CAUTION: Although special care has been taken to minimize sharp edges in the construction of your unit, be extremely
careful when handling parts or reaching into the unit.
AIR EXCHANGE
OFF LOW
INTERMITTENT
ON
% RELATIVE HUM. EXT. TEMP.
21°C+/ 70°F+
10°C / 50°F
0°C / 32°F
60%
55%
45%
VL3A
ENERGY RECOVERY VENTILATOR

2
BEFOREYOU REQUEST A SERVICE CALL.
• Check the main power disconnect switch. Verify that the circuit breakers are ON or that fuses have not blown. If you must reset
breakers or replace fuses, do so only once. Contact your servicing dealer for assistance if the breakers trip or the fuses blow a second
time.
• Check for sufficient airflow. Check the air filters for any accumulations of large particles. Check for blocked exhaust-air grilles or
ductwork. Be sure grilles and ductwork are open and unobstructed.
• Check to see if the outside air temperature is around 15°F(–10°C).Your unit will not operate for 3 hr after it senses that the outside
air is at 15°F(–10°C)
If your ERV still fails to operate properly, contact your servicing dealer. Give him your model and serial number. With this infor-
mation, the dealer will be able to correct any problems.
A94360
FILTERS ARE REMOVABLE
BY PULLING STRAIGHT OUT
BRIEF CASE
TYPE LATCH
ENERGY RECOVERY CORE CAN
BE REMOVED BY PULLING
STRAIGHT OUT
DOOR IS
DETACHABLE
Copyright 1998 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
Form: OMVL3A-1 Cancels: OG-VL3A-01 Printed in U.S.A. 7-98 Catalog No. 01VL-3A1