Lochinvar Hydronic Sleuth Challenge FIXED 3

Lochinvar Hydronic Sleuth Challenge FIXED 3

April’s Correct Diagnosis
Answer
1. 50 feet of 1-1/2” piping only
provides 923,000 Btu/Hr
capacity. Piping size must be
increased to 2”.
2. Improper installation of flow
switch. Each heat exchanger
must use individual flow switches
for proper verification of flow.
3. Outdoor temperature sensor
should measure 15,311 ohms at
60°F. Sensor must be replaced.
Lochinvar SYNC Boiler
Low Voltage Only
Line Voltage Only
8
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
FS2 FS1
120V
L Supply
N
Tank
Sensor
System
Sensor
Outdoor
Sensor
(+)
0-10V(dc)
(-)
A
B
Shield Gnd
R W
9 10 11 12 13 14
Shield Gnd
Hex2
Flow Switch
7
6
Enable
Louver
Proving
5
Tank
Thermostat
Run Time
Contacts
3 4
Hex1
Flow Switch
Alarm
Contacts
1 2
Shield Gnd
B
A
Shield Gnd
Cascade
Mod Bus
1 2
S1 S2
1.8amp
Max
HWG
MAX 1.5HP/120V
3HP/240V
Pumps
Dry Contacts Provided
5AMP
MAX
Louvre
Contacts
Pump
System HEX1 HEX2
Relay
3 4
5 6
7
8
9 10 11 12
P3 P1 P2
Thermostat
(with proper voltage)
L
N
L
N
300 Maddox Simpson Parkway
|
L e b a n o n, T N
37090
|
615-889-8900
|
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