Table des Matières
Publicité
Les langues disponibles
Les langues disponibles
INSTALLATION - MOUNTING HEIGHT / OPERATION
Mounting Height
Height at which cabinet unit heaters are installed is critical.
Maximum mounting heights for all units are listed in the tables
below. The data in tables are based on operating conditions of 2
lbs. steam or 220°F entering water with 60°F entering air. When
operating conditions are other than those above, refer to chart
for mounting height correction factor. To obtain the maximum
mounting height at actual operating conditions, multiply the
appropriate factor from chart by the mounting height in Tables.
The mounting heights must be followed closely to assure
maximum comfort.
Strong opposing drafts, large obstructions in the air stream of
the unit, and higher than normal discharge air temperatures
(resulting from high steam pressures) can prevent the heated air
discharged by the cabinet unit from reaching the floor.
Under unfavorable conditions such as these, allowances must be
made to assure maintenance of desired comfort.
Table / Figure 4.1 - Maximum Mounting Height
Standard Air Flow
Size
H
T
Ceiling-Mounted
(Ft.)
(Ft.)
002
8
15
H
003
8
18
004
9
22
006
9
23
Inverted Air Flow
Wall-Mounted
008
10
26
010
10
27
H
012
11
26
014
11
27
Standard Air Flow
Size
H
T
Ceiling-Mounted
(Ft.)
(Ft.)
002
7
8
003
8
10
H
004
8
11
006
8
12
Inverted Air Flow
Wall-Mounted
008
10
16
010
10
18
012
11
20
H
014
11
21
Maximum mounting height and corresponding heat throw of heaters operating
j
at standard conditions (2 lbs. steam or 220°F entering water, 60° entering air).
Table 4.2
Maximum Mounting Heights Correction Factors
These correction factors are to be used as multipliers to correct
the maximum recommended mounting heights "H" or heat
throw "T" of cabinet unit heaters when operated with steam
pressures other than 2 pounds or with water at other than
entering temperature of 220°F.
1.3
1.2
1.1
1.0
.9
.8
.7
.6
.5
150°
160°
170°
180°
AVERAGE WATER TEMP. (°F)
4
T
T
T
T
Steam Pressure
2
5
10
190°
200°
210°
220°
230°
OPERATION
1. Make sure fuses are installed in fused disconnect switches.
2. Check all electrical connections to assure they are secure.
3. Check rigidity of unit mounting. Tighten all fasteners,
if necessary.
4. Inspect piping, strainers, traps, fittings, etc.
Initial Start-Up
1. Set thermostat to lowest position.
2. Turn on power supply to unit.
3. Open return gate valve, and then open supply gate valve
to unit.
4. Raise thermostat setting to desired position.
5. Adjust louvers (if provided) for desired heat distribution.
6. To insure proper sequence of operation, cycle unit on and
off a few times by raising and lowering thermostat setting.
7. Check for proper rotation of fan. See dimensional drawings
on page 8 or 9 for indication of fan rotation.
Automatic Control Operations
Install one of the following operating systems for continuous
automatic control.
Intermittent Fan Operation — Hot Coil
A room thermostat starts and stops the fan motor. An aquastat
is sometimes strapped to the return piping to prevent fan
operation when heat is not being supplied to the unit heater.
Continuous Fan Operation — Intermittent Hot/Cold
Coil
A room thermostat controls a valve which opens to allow steam
or hot water to supply the unit and closes to shut off the supply
when the thermostat is satisfied.
240°
11-500.7
Publicité
Chapitres
Table des Matières
