Dectron, Inc. March 2012
DSH/DSV/RSH/DBH/RBH Series Dehumidifier Owner’s Manual
Startup Pre-Startup Adjustments
Data subject to change without notice.
212
Be sure that the following manual valves have been opened:
1. Depending on the size of the unit, the compressor(s) may have manual isolation valves. Where present, these
valves must
be opened before attempting to operate the compressor(s). Do not open these valves until the
compressor crankcase heaters have been turned on.
2. Depending on the type of unit, there may be refrigerant receivers. Where present, receivers on each circuit will
have two isolation valves. These valves must
be opened before attempting to operate the compressor(s).
Risk of explosive depressurization. Can cause injury or death.
Once these valves have been opened, they should not
be closed again unless 1/2
pound (250g) of refrigerant is reclaimed from the filter-drier and into the receiver (or the pressure is reduced below
10 PSIG (69 kPa)) immediately af
ter
closing the valves.
3. For units with air-cooled air conditioning only - the condenser tubes of each circuit will have isolation valves
inside the cabinet. These valves must be opened before attempting to operate the compressor(s).
Risk of explosive depressurization. Can cause injury or death.
Once these valves have been opened, they should not
be closed again unless 1
pound (500g) of refrigerant is reclaimed from the condenser and into the receiver (or the pressure is reduced below
10 PSIG (69kPa)) immediately af
ter
closing the valves.
4. Do not adjust any other manual valves at this time.
DECTRON
Each compressor may have
isolation valves (4 shown).
Some compressors may have
oil sight glasses.
Where present, be sure the oil
level is correct.
Any receivers will
have isolation valves
(4 shown).
Units with air-cooled air
conditioning only - Each
condenser tube will have an
isolation valve (4 shown).
EVAPORATOR BYPASS DAMPER(S)
Some units may have manual evaporator-bypass dampers. In this case the
damper must be closed completely
1
as long as the room temperature is
below 78°F (25.6°C). If the room temperature at startup is above 78°F
(25.6°C), a manual evaporator-bypass damper should be fully open.
1. Exception: For DSV units size 040 and larger, the minimum setting is
35% open.
On other units the evaporator-bypass damper will be electrically operated.
Except for vertical units size 040 and larger, it should close for evaporator-
leaving-air temperatures below a preset value. For DSV units size 040 and
larger, confirm that the minimum damper opening is 35% open.
Evaporator
Bypass Damper
Sample
Actual layout
may vary.
Sample
Actual layout
may vary.
Risk of contact with moving parts. Can cause injury or death.
This product contains rotating parts and V-belt drives. Some installation, service, and
maintenance procedures could expose personnel to the risk of injury or death from
contact with these parts.
Using only approved devices (e.g. locking safety switch), disconnect, lockout, and
tagout all sources of electrical energy before working inside the unit cabinet. Allow
adequate time for rotating parts to stop. Follow all applicable safety regulations.
WARNING
WARNING
WARNING
STARTUP
To Next Page
Loading...
Need help?
General
