15
NOTE: For specific voltages adjustment please contact Carrier
factory representative.
When the 42DH unit is ordered with Proportional Control, no
control board is required, and no field adjustments are possible.
Motor uses a 0-10VDC signal directly. See control box label.
Fan enabled at 1.5VDC.
Water Balancing System
A complete knowledge of the hydronic system, along with its
components and controls, is essential to proper water system
balancing. This procedure shall not be attempted by unquali-
fied personnel. The system must be complete, and all compo-
nents must be in operating condition BEFORE beginning water
system balancing operations.
Each hydronic system has different operating characteristics de-
pending on the devices and controls used in the system. The ac-
tual balancing technique may vary from one system to another.
After the proper system operation is established, record the ap-
propriate system operating conditions such as various water
temperatures and flow rates in a convenient place for future
reference.
Before, and during water system balancing, conditions may ex-
ist due to incorrect system pressures which may result in no-
ticeable water noise or undesirable valve operation. After the
entire system is balanced, these conditions will not exist on
properly designed systems.
Table 5 — Motor Performance Data
(Full Load Amps)
NOTES:
1. Motor Full Load amps refer to National Electric Code (NEC) amps;
actual motor nameplate amps may vary.
2. Motors are UL recognized, constant speed brushless DC type,
open drip proof, ball bearing, multi-voltage options, 0-10 V control.
Table 6 — Single Phase Electric Heater Availability
LEGEND
NOTES:
1. Electric Heating Capacities BTUh)=Heater kW x 3413.
2. Electric Heater Amperage for Single-phase Power = (Heater kW x
1000)/Applied Voltage.
MOTOR TYPE
VOLTAGE
42DH UNIT SIZE
06, 08
08, 12, 16, 20
22
30
MOTOR HORSEPOWER AND FLA (HP)
1
/
2
1
1
1
/
2
3
1-PHASE
SINGLE SPEED
STANDARD
EFFICIENCY
115V/1 PHASE/50-60 Hz
6.40
10.70
N/A
N/A
208V/1 PHASE/50-60 Hz
3.80
6.30
N/A
N/A
230V/1 PHASE/50-60 Hz
3.60
5.80
N/A
N/A
277V/1 PHASE/50-60 Hz
3.20
5.10
N/A
N/A
3-PHASE
SINGLE SPEED
STANDARD
EFFICIENCY
208V/3 PHASE/50-60 Hz
2.00
7.00
4.4
8.9
230V/3 PHASE/50-60 Hz
1.85
6.50
4.4
8.9
460V/3 PHASE/50-60 Hz
1.00
1.75
2.2
4.4
kW
Electric Heater Amps
42DH UNIT SIZE (Heater Stages)
Single Phase (1 or 2 Stage)
06
08
10
12
16
20
120V
208V
240V
277V
1 stg
2 stg
1 stg
2 stg
1 stg
2 stg
1 stg
2 stg
1 stg
2 stg
1 stg
2 stg
1.0
8.3
4.8
4.2
3.6
X
—
X
—
—
—
—
—
—
—
—
—
1.5
12.5
7.2
6.3
5.4
X
—
X
—
X
—
X
—
—
—
—
—
2.0
16.7
9.6
8.3
7.2
X
—
X
—
X
—
X
—
—
—
—
—
2.5
20.8
12.0
10.4
9.0
X
—
X
—
X
—
X
—
X
—
—
—
3.0
25.0
14.4
12.5
10.8
X
X
X
X
X
X
X
X
X
X
—
—
3.5
29.2
16.8
14.6
12.6
X
X
X
X
X
X
X
X
X
X
X
X
4.0
33.3
19.2
16.7
14.4
X
X
X
X
X
X
X
X
X
X
X
X
4.5
37.5
21.6
18.8
16.2
X
X
X
X
X
X
X
X
X
X
X
X
5.0
—
24.0
20.8
18.1
X
X
X
X
X
X
X
X
X
X
X
X
6.0
—
28.8
25.0
21.7
X
X
X
X
X
X
X
X
X
X
X
X
7.0
—
33.7
29.2
25.3
—
—
X
X
X
X
X
X
X
X
X
X
8.0
—
38.5
33.3
28.9
—
—
X
X
X
X
X
X
X
X
X
X
9.9
—
—
—
35.7
—
—
—
—
X
X
X
X
X
X
X
X
12.0
—
—
—
43.3
—
—
—
—
—
—
X
X
X
X
X
X
X — Available Option
– — Not Available
