Carrier HRVCCSVU Guide

User's Intbrmation Manual for the Operation and
Maintenance of Heat Recovery Ventilators
OFF LO,_ XlGH
P.RRET BAS_ HAUIE
%OHU_,_IIDIIERE_I1V£ HUMIOW¢
% HUM RE_I1VI: HLIM EX_ Ti_ EXT
© ©
AIA EXCHANG£ ON
ECHANGE O AIR MARCHE
OFF LOW
_NTERMITrENT
% D'HUMIDmE RELATIVE H UMIOI'P¢
Basic Control Standard Control Automatic Control
Fig. 1 -- Controls AO0030
OPERATING YOUR HEAT RECOVERY VENTILATOR (HRV)
Your HRV is designed to operate as an integral part of your total heating and cooling system. With the exception of high capacity
models, which are available with standard controls only, all HRVs offer 3 control options (See Fig. 1.):
• Basic Controls: Allow the user to manually set the unit to low- or high-fan speed as required to maximize comfort. Controls may
be unit mounted.
• Standard Controls: Offer automatic dehumidistat control and the option to select low speed or intermittent fan during heating season.
• Automatic Controls: In addition to the operational features found with standard controls, automatic controls feature a recircula-
tion mode. Not for use with forced-air HVAC systems.
Fan Speed Control--Enables user to modulate fan speed from low to high.
Dehumidistat Control--Allows the user to select the relative humidity level at which the unit would change fan speed to avoid
condensation problems while heating during the winter months.
TABLE 1 -- HUMIDITY SETTINGS
*C
10
0
-10
-20
-30
OUTSIDE TEMPERATURE
*F
50
32
14
-4
-22
DOUBLE-PANE WINDOWS
(PERCENTAGE)
55
45
35
30
25
TRIPLE-PANE WINDOWS
(PERCENTAGE)
65
55
45
40
35
Continuous Mode--If the relative humidity inside the building is lower than selected, air exchange would occur with the outside
at low speed. If the relative humidity level inside the building is higher than selected, air exchange would occur outside at high
speed. This ensures continuous air exchange for constant air quality.
Intermittent Mode--If the relative humidity inside the building is lower than selected, no air exchange would occur, and the sys-
tem would turn off. If the relative humidity inside the building is higher than selected, air exchange would occur with outside at
high speed. This ensures minimum air exchange level when the building is unoccupied to minimize operating cost.
Reeirculation Mode---If the relative humidity inside the building is lower than selected, indoor air would be circulated and filtered
at high speed. If the relative humidity inside the house is higher than selected, air exchange would occur with outside at high speed.
This ensures continuous movement and filtration of air for maximum comfort.

PERFORMING ROUTINE MAINTENANCE
Z_ WARNING: Before servicing system, always turn off main power to system.There may be more than I disconnect switch.
Turn off accessory heater power if applicable. Electrical shock can cause personal Injury or death.
Z_ CAUTION: Although special care has been taken to minimize sharp edges in the construction of your unit, be extreme,_
careful when handling parts or reaching into the unit. t
I. The motors are factory lubricated. Lubricating the bearings is not recommended.
2. The heat recovery core must be handled with care. To ensure maximum efficiency of the plastic partitions wash core once a
year following the season of most intense use.
Allow the heat recovery core to soak for 3 hr in a solution of warm water and mild soap. Rinse under a heavy stream of warm
water. Hot water and strong detergent should NOT be used. as it will damage the heat recovery core.
3. A dirty air filter will cause excessive strain on the blower motor. The filters in your HRV are washable, and should be cleaned
every 3 months. Use a vacuum cleaner to remove the heaviest portion of accumulated dust, then wash in warm water.
The Air Exchange Indicator light on the auto control wilt indicate when filters should be cleaned, The light will flash on and
off until the door is opened to service the unit.
4. Regularly check the screen on the exterior intake hood and clean as necessary.
5. Examine the condensate drain pan to ensure drains are functioning properly. Gently clean tray with mild soapy water.
(See Fig. 2 and 3.)
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 sec-
ond time.
• Check for sufficient airflow. Check air filters for accumulations of large particles. Check for blocked exhaust-air grilles or duct-
work. Keep grilles and ductwork open and unobstructed.
• If the condensate fails to drain properly, check the grommet and drain tube for obstructions. Make sure that the condensate drain
tube has a slight slope and is not kinked.
If your HRV still fails to operate properly, contact your servicing dealer. Give him your model and serial number. With this infer-
mation, the dealer will be able to correct any problems.
FRESH AIR FRESH AIR
FROM OUTSIDE TO BUILDING
STALE AIR
TO OUTSIDE
STALE AIR
FROM BUILDING
ENERGY RECOVERY
CaRE CAN BE REMOVED_
By PULLING STRAIGHT CUT
BRIEFCASE
TYpE L_TCH
E
_FU FILTERS ARE
REMOVABLE BY
LU_C_STRAiGPr£
A99300
Fig. 2 -- Vertical Application
A92382
Fig. 3 -- Horizontal Application
Copyright 2000 CARRIER Corp.• 7310 W. Morris St. •Indianapolis, IN 46231
Form: OMHRV-1 Cancels: New Printed in U.S.A. 2-00 Catalog No. 03HR-VC0