Daikin DZ18VC Series Installation Instructions Manual page 7
Heat pump unit
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Also See for DZ18VC Series:
- Instructions (4 pages) ,
- Service instructions manual (88 pages)
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Voltage Ports
NOTE: The communicating thermostat is able to search and
identify the indoor and outdoor units when power is applied
to the system. Refer to the communicating thermostat's in-
stallation instructions manual for more information.
Connect low voltage communication wires (1, 2) to low voltage
pigtail provided.
Thermostat Wiring
NOTE: A removable plug connector is provided with the
control to make thermostat wire connections. This plug may
be removed, wire connections made to the plug, and replaced.
It is STRONGLY recommended that you do not connect more
than two wires into a single terminal in the field because there
is a risk of the wires becoming loose. Failure to do so may
result in intermittent operation.
To wire the system components, it is strongly recommended to
use the same type and the same gague for the wires prepared
in the field (for best results use 18 AWG). However, commu-
nications reliability may be improved by using a high quality,
shielded, twisted pair cable for the data transmission lines.
Two-Wire Outdoor, Four-Wire Indoor Wiring
Low voltage wiring consists of two wires between the indoor
unit and outdoor unit and four wires between the indoor unit
and thermostat. The required wires are data lines 1 and 2,
"R" (24 VAC hot) and "C" (24 VAC common).
IN CASE OF AIR HANDLER
1
2
C
1
2
R
1
2
R
(*) Allowable Maximum Length
System Wiring
Low Voltage Port High Voltage Port
Communica�ng Thermostat
R
(In case of Daikin One+ Smart
Thermostat)
125 �. (*)
Air Handler Blower
C
Integrated Control Module
250 �. (*)
Outdoor Unit
C
Integrated Control Module
Step 1. Calculate Refrigerant Charge Based
on Line Set Length
The heat pump unit is shipped with a predetermined factory
charge level as shown below. For longer line sets greater than
15 feet, add 0.6 ounces of refrigerant per foot. Refer to the
following page for the equivalent length of the elbow fittings.
NOTICE
T
R
OTAL
EFRIGERANT
F
C
+ (0.6
ACTORY
HARGE
A
L
S
OF
CTUAL
INE
ET
The following table shows refrigerant amounts for every 5
feet of line.
Actual Line Set
Length (ft.)
15 (Factory Charge)
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
IN CASE OF COIL
1
2
C
R
1
2
R
C
2
1
R
C
1
2
R
C
7
(*) Allowable Maximum Length
=
./
. * A
F
OZ
FT
DDITIONAL
).
Unit Tonnage
2-Ton
3-Ton
4-Ton
Total Refrigerant (Oz.)
139
139
160
142
142
163
145
145
166
148
148
169
151
151
172
154
154
175
157
157
178
160
160
181
163
163
184
166
166
187
169
169
190
172
172
193
175
175
196
178
178
199
181
181
202
184
184
205
187
187
208
190
190
211
Communica�ng Thermostat
(In case of Daikin One+ Smart
Thermostat)
125 �. (*)
Cased Coil
Integrated Control Module
Gas Furnace or Module Blower
Integrated Control Module
250 �. (*)
Outdoor Unit
Integrated Control Module
EET
5-Ton
237
240
243
246
249
252
255
258
261
264
267
270
273
276
279
282
285
288
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