GL-35 GL-35-LV

GL-35
GL-35-LV
Solar Pool & Spa Control
Description
The GL-35 and GL-35-LV are differential
temperature controls for solar heating of pools,
spas, and hot tubs. These models provide
differential temperature control with an
adjustable, calibrated water temperature high
limit. Automatic nocturnal cooling (for pools that
overheat in hot climates) and recirculate freeze
protection functions can be enabled/disabled via
internal jumpers.
Input power can be either 115 or 240 VAC.
The output controls a 24 VAC automatic valve
actuator. For older systems with 12 VAC valves,
an internal jumper can be moved to select 12 VAC
output operation. The GL-35-LV has one output
for controlling a single valve and is available only
as part of the GLC (Goldline Combo). The GL35 has one output for controlling a single valve
and a second output for controlling a filter pump
or booster pump.
Specifications
Power:
Output:
105-130VAC, .5A 50/60Hz.
or
195-250VAC, .3A 50/60Hz
On differential:
4°F
Off differential:
1.5°F
Selectable low voltage
24VAC, 20VA, .85A or
12VAC, 20VA, 1.7A
High limit:
70-104°F calibrated
scale
GL-35:
SPST-NO isolated contact
115VAC 1 HP
240VAC 2 HP
Sensors: 2 required (thermistor, 10K @ 25°C/
77°F) snap switches recommended
if recirculate
freeze protection is used)
Recirculate freeze:
on at 40°F, off at 45°F
Nocturnal cooling:
on when collector 6°F
less than pool and pool
hotter than high limit,
off when collector 3°F
less than pool or pool
cooler than high limit
Installation
page 2
1.
Mounting
The GL-35/LV is designed for outdoor use.
Mount the box vertically with the knockouts
facing downward. For safety, the GL-35/LV must
be a minimum of 5 feet (horizontally) from the
pool or spa.
2. Power input
Turn off power at circuit breaker before wiring.
Remove the internal panel to expose the wiring
connections. Either 115VAC or 240VAC can
be used. Refer to the input wiring diagram
(Figure 1) below.
3.
Grounding
Refer to NEC and local codes for specific
grounding requirements. In general, a separate
ground conductor (12AWG minimum) must be
run to the ground terminal on the pool service
panel.
4.
Output wiring to solar valve(s)
The GL-35 and GL-35-LV control a single valve.
In most applications this is the solar valve which
diverts water through the collector panels or
through the normal pool loop depending on
conditions.
All controls are shipped with the output voltage
set to the industry standard 24 VAC To use the
GL-35/LV with older 12 VAC valves, move the
jumper J1, located next to the fuse on the main
circuit board (see Figure 2).
The GL-35 provides two different types of
connections to the pool/spa actuators. For older
actuators with no wire end connectors, a 3
position terminal block is used. Connect the wires
to the proper terminal block according to the color
code shown in Figure 4. If the valve operates
opposite to the way it is supposed to, reverse the
red and white wires. Be careful not to short
the valve output wiring. The GL-35/LV is
fused and shorting the output will require
replacing the fuse.
For newer Goldline, Jandy and Compool
actuators (with wire end connectors), two 3 pin
connectors are supplied. (The GL-35-LV model,
supplied as part of the GLC Goldline Combo, has
two 3 pin connectors only.) Plug the actuator
into one of the two 3 pin connectors as shown in
Figure 2 or 3. If the valve operates opposite to
the way it is supposed to, disconnect and plug
into the other connector.
5.
Sensor Mounting and Wiring
Most installations use a PC insolation sensor
connected to the “COLLECTOR” terminals and
another PC drill-in sensor (for plastic piping)
connected to the “POOL/SPA” terminals (see
various diagrams).
Other 10K ohm Goldline sensors may be substituted. Wire should be twisted pair 20AWG.
Sensor wiring run outdoors must be rated for
outdoor use and ensure that the wire connections
are protected from the weather. For long runs or
runs near other electrical wiring use shielded
cable (Belden 8428 for outdoor use). Ground
the shields to the GL-35/LV ground screw.
6.
Freeze Protection
If you are relying on the collectors naturally
draining to provide freeze protection it is very
important that you use a non-positive seal valve
or drill a hole in the diverter of a positive seal
valve to allow the collectors to drain.
Alternatively, the GL-35/LV control can provide
recirculate freeze protection. If enabled, when
the GL-35/LV senses a freeze condition at the
collector sensor, it will allow circulation of
G L-35 only
G L-35 only
EA RTH
G ROU ND
EA RTH
G ROU ND
L1
240 VAC
in put pow er L2
115/240 VAC from
separate circuit
L1
115 VA C
in put pow er N
Boo ster
Pum p
L1
115/240 VAC from
separate circuit
L2
Boo ster
Pum p
L1
N
115 VA C
240 VA C
Figure 1
Installation(continued)
relatively warmer water from the pool to
the collector panels. The GL-35/LV will
allow recirculation when the collector
temperature falls to 40ºF and will stop
circulation when the collector temperature
rises to 45ºF. While this type of freeze
protection has proven to be adequate in
relatively mild climates, it is extremely
important that the sensors be properly
placed and that the homeowner realize that
the system is unprotected in the event of a
power failure. Recirculate freeze protection
is NOT recommended in climates where
freezing temperatures are common or last
for extended periods.
The GL-35 is shipped from the factory with
recirculate freeze protection disabled (the
jumper is installed on a single pin). To activate
recirculate freeze protection, install the jumper
provided onto the left two pins on the circuit
board mounted to the front panel. See diagram
inside control. IE strongly recommends using
1 or more GC-1 or GC-2 freeze snap switches
in addition to the collector sensor.
page 3
Snap switches should be wired in series with the
collector thermistor sensor. Placement of the
snap switch(es) at the coldest points of the collector
array and exposed plumbing system will help
assure that freeze protection starts early enough to
protect the system. Freeze sensors should also be
located to ensure that once recirculation has started,
the entire collection system is heated before the
sensors react to stop circulation.
If recirculate freeze protection is to be used on a
GL-35/LV either:
•
the filter pump must be set for continuous
operation.
•
the GL-35 High Voltage Output must be wired
for Timer Override function.
7.
Nocturnal Cooling
The GL-35/LV has nocturnal cooling logic which
can be enabled/disabled via a jumper on the circuit
board mounted to the front panel. During nighttime
Figure 2
Installation(continued)
hours, when enabled, the GL-35/LV will
circulate relatively warmer water from the
pool to the collector panels, thus cooling the
pool over time. The GL-35/LV will circulate
water when the collector temperature is 6º
less than the pool temperature AND the pool
temperature is hotter than the high limit
setting. Circulation will stop when the
collector temperature is 3ºF less than pool
temperature OR the pool temperature is
cooler than the high limit setting. The GL-35/
LV is shipped from the factory with nocturnal
cooling disabled (the jumper is installed on a
single pin). To activate nocturnal cooling, install
the jumper provided onto the right two pins on
the circuit board mounted to the front panel. See
diagram inside control. If nocturnal cooling is to
be used on a GL-35/LV either:
•
the filter pump must be set for continuous
operation.
page 4
•
the GL-35 High Voltage Output must be
wired for Timer Override function.
9. Booster Pump (model GL-35 only)
The GL-35 can control a high voltage booster
pump in addition to the normal low voltage solar
valve. Note the high voltage relay contacts are
isolated so that the booster pump can be run on a
separate circuit, as required by many local codes.
The GL-35 will turn the booster pump and solar
valve on/off simultaneously. Refer to Fig. 4 on
page 6 for typical wiring.
10. Timer Override (model GL-35 only)
The GL-35 can also be used to override the filter
pump timer. This is very important if the
recirculate freeze protection or nocturnal cooling
functions are being used. Also, this function can
be used on systems where the system should
operate whenever solar heat is available,
regardless of the timer settings. Refer the GL-35
control in Fig 3. for typical timer override
wiring.
Figure 3
Operation
page 5
For normal operation place the switch in the
“AUTO” position and adjust the desired pool/
spa/hot tub temperature setting. The “Power”
LED indicator should always be on. The
“Heating” LED indicator will show when the
system is collecting solar heat. If the
nocturnal cooling function is enabled inside
the GL-35/LV, the “Cooling” LED indicator
will show when the system is exhausting excess
heat.
In the "AUTO" position, the GL-35/LV will
heat the pool or spa (rotate valve to solar
loop) when the collector sensor temperature
is higher than the pool/spa sensor temperature
by 4ºF or more AND the pool or spa
temperature is less than the high limit setting.
The GL-35/LV will stop heating (return valve
to pool loop) when the two sensor
temperatures get to within 1.5ºF OR the pool
or spa sensor is above the high limit setting.
To test the system, move the switch to “ON” and
verify that both the “Heating” and “Cooling”
indicators light and that the valve(s) are in the
solar loop position. Move the switch to “OFF”
and verify that all indicators except “Power” are
off. The valve(s) should be in the normal
recirculating loop position. If the valve(s)
positions are working in reverse, see section
4. in the Installation section. If you are
relying on recirculate freeze protection for
your system, do NOT leave the system in the
“OFF” position during cold weather. Also
note that the switch does NOT turn power
off to the GL-35/LV.
Figure 4
Troubleshooting
1. Fuse Replacement
The GL-35/LV is protected by a fuse which is
located on the circuit board in the bottom of
the unit. Replace the fuse with a 2A, type
3AG fuse which is readily available in most
electrical or electronics stores.
2.
If “Heating” is always on
Disable recirculate freeze protection if enabled.
Check that the switch is in the “AUTO” position.
Next verify that the control circuitry is operating
properly by disconnecting the collector sensor and
temporarily shorting the two storage sensor
terminals. The “Heating” LED should go off. If
so, check both sensors with an ohmmeter referring
to the temperature vs. resistance chart on the back
page. If “Heating” remains on there is an internal
circuit failure and the GL-35/LV will have to be
returned for repair.
3.
If “Heating” never comes on
Check that the switch is in the “AUTO” position.
Disconnect the pool sensor from the GL-35/LV
and temporarily short the two collector sensor
terminals. The “Heating” LED should go on. If
so, check both sensors with an ohmmeter referring
to the temperature vs. resistance chart on the back
page. If “Heating” still does not come on
there is an internal circuit failure and the GL35/LV will have to be returned for repair.
4.
If nocturnal “Cooling” is always on
Check that the switch is in the “AUTO” position.
Disconnect the pool sensor and temporarily short
the two collector sensor terminals. The “Cooling”
LED should go off and the “Heating” LED should
go on. If so, check both sensors with an
ohmmeter referring to the temperature vs.
resistance chart on the back page. If
“Cooling” still does not go off there is an
internal circuit failure and the GL-35/LV
should be returned for repair.
page 6
5. If nocturnal “Cooling” is never on
Disable recirculate freeze protection if enabled.
Check that the switch is in the “AUTO”
position. Disconnect the collector terminals
and temporarily short the two pool sensor
terminals. The “Cooling” LED should go on.
If so, check both sensors with an ohmmeter
referring to the temperature vs. resistance
chart on the back page. If “Cooling” still
does not come on there is an internal circuit
failure and the GL-35/LV should be returned
for repair.
6.
Recirculate “Freeze Protection”
runs continuously
Temporarily short collector sensor terminals. The
output should go off. If so, verify that the
collector sensor is warmer than 45°F using an
ohmmeter and the temperature vs. resistance
chart on the back page. Also check that all GC1 or GC-2 snap switches are closed (normally
54°F or above). If freeze protection is still on
there is an internal circuit failure and the GL-35/
LV should be returned for repair.
7.
Recirculate “Freeze Protection”
never runs
Check that the internal jumper that enables freeze
protection is properly installed and the switch is
in the “AUTO” position. Temporarily disconnect
the collector sensor. The freeze protection
should go on. If so, verify that the collector
sensor is colder than 45°F using an ohmmeter
referring to the temperature vs. resistance
chart on the back page. If freeze protection
still does not go on there is an internal circuit
failure and the GL-35/LV should be returned
for repair.
Technical Assistance
For help in installing, operating, or
troubleshooting this control, you may call
for technical assistance at 800-343-0826.
Independent Energy’s technicians are
available from 8:00AM to 5:00PM Eastern
Time, Monday through Friday. You may call
at other times and leave a message, and a
technician will call you back as soon as possible.
Temperature vs. Resistance
All Goldline controls use 10K thermistor sensors. When disconnected from the control
the sensor will read 10K ohms at 25ºC/77ºF.
Refer to the chart below for the resistance at
°F
-50
-49
-48
-47
-46
-45
-44
-43
-42
-41
-40
-39
-38
-37
-36
-35
-34
-33
-32
-31
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
OHM
491,14
472,64
454,90
437,90
421,60
405,96
390,96
376,57
362,77
349,52
336,80
324,59
312,87
301,62
290,81
280,43
270,46
260,87
251,67
242,82
234,31
226,13
218,27
210,71
203,44
196,45
189,72
183,24
177,01
171,02
165,25
159,69
154,34
149,19
144,23
139,45
134,85
130,42
126,14
122,03
118,06
114,23
110,54
106,99
103,56
100,25
97,063
93,986
91,017
88,152
°F
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
OHM
85,387
82,719
80,142
77,656
75,255
72,937
70,698
68,535
66,447
64,428
62,479
60,595
58,774
57,014
55,313
53,669
52,078
50,541
49,054
47,616
46,225
44,879
43,577
42,318
41,099
39,919
38,777
37,671
36,601
35,565
34,561
33,590
32,648
31,737
30,853
29,998
29,169
28,365
27,587
26,832
26,100
25,391
24,704
24,037
23,391
22,764
22,156
21,566
20,993
20,438
GOLDLINE CONTROLS
°F
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
OHM
19,900
19,377
18,870
18,377
17,899
17,435
16,985
16,548
16,123
15,711
15,310
14,921
14,543
14,176
13,820
13,473
13,136
12,809
12,491
12,182
11,882
11,589
11,305
11,029
10,761
10,500
10,246
9,999
9,758
9,525
9,297
9,076
8,861
8,651
8,447
8,249
8,056
7,867
7,684
7,506
7,333
7,164
6,999
6,839
6,683
6,530
6,382
6,238
6,097
5,960
°F
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
other temperatures. For a given temperature, the resistance reading should be accurate
to ±1%. For a given resistance reading, the
temperature reading should be accurate to
±0.5ºF.
OHM
5,827
5,697
5,570
5,446
5,326
5,208
5,094
4,982
4,873
4,767
4,664
4,563
4,464
4,368
4,274
4,183
4,094
4,007
3,922
3,839
3,758
3,679
3,602
3,527
3,454
3,382
3,312
3,244
3,177
3,112
3,049
2,987
2,926
2,867
2,809
2,752
2,697
2,643
2,591
2,539
2,489
2,440
2,392
2,345
2,299
2,254
2,210
2,167
2,125
2,084
°F
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
OHM
2,044
2,005
1,966
1,929
1,892
1,856
1,821
1,787
1,753
1,720
1,688
1,657
1,626
1,596
1,567
1,538
1509
1,482
1,455
1,428
1,402
1,377
1,352
1,328
1,304
1,281
1,258
1,235
1,213
1,192
1,171
1,150
1,130
1,110
1,091
1,072
1,054
1,035
1,017
1,000
983
966
950
933
918
902
887
872
857
843
°F
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
OHM
829
815
802
788
775
763
750
738
726
714
702
691
680
669
658
648
637
627
617
607
598
588
579
570
561
553
544
536
527
519
511
503
496
488
481
473
466
459
452
445
439
432
426
420
413
407
401
395
390
384
°F
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
OHM
378
373
367
362
357
352
347
342
337
332
327
323
318
314
309
305
301
296
292
288
284
280
276
273
269
265
262
258
255
251
248
244
241
238
235
232
229
225
223
220
217
214
211
208
206
203
200
198
195
193
190
42 Ladd Street,
East Greenwich, RI 02818
(401) 884-6990 (800) 343-0826 (401) 885-1500 fax
130009i