Chromalox FXTH-12012 설치 및 운영 매뉴얼 - 페이지 5
{카테고리_이름} Chromalox FXTH-12012에 대한 설치 및 운영 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Chromalox FXTH-12012 12 페이지. Type fxth flexible tank heater
페이지 인쇄INSTALLATION OF HEATER ASSEMBLY IN TANK (cont'd.)
G. Carefully unwind and straighten thermostat capillary tube. The
capillary must be reasonably straight. Be absolutely certain the
bulb is seated at bottom of well. Carefully coil any excess capil-
lary and position next to thermostat and away from electrical con-
nections. Repeat same procedure if low limit alarm is provided.
Attach wire for overtemperature sensor to terminals.
NOTE: Over-temperature control is located in the Chromalox
Control Center. If heater is supplied without control center, be
sure to obtain an over-temperature control for a positive thermis-
tor, otherwise heater will be without over-temperature protection.
H. If the low temperature thermostat is being used, connect annunci-
ator leads directly to terminals on this thermostat and provide an
independent power source. The switch rating is; 20 amp @ 115V,
15 amp @ 230V, pilot duty 125VA.
L1
L2
L3
Circuit
Breaker
Power On
Control Relay
Heat
Htr. Contactor #1
#1 Time Delay Relay(15 Sec.)
#2 Time Delay Relay(30 Sec.)
Heat
Heater Contactor #2
Heat
Heater Contactor #3
Overtemp.
A2
Thermistors located on heater with leads in conduit riser.
One thremistor per heater tube.
Figure J
IL1
IL2
Terminal
IL3
Fuses
C1
1
F3
F4
F5
C2
2
F6
F7
F8
C3
3
F9
F10
F11
F1
H4 H2 H3
F2
X2
1CR
A
1CR
C1
1 TDR
2 TDR
A
1 TDR 2
C2
A
3
2 TDR
C3
R
1CR
A1
Audible Alarm
(Optional)
I. If temperature indicator is employed, wire in accordance with
Figure J. Use wire size as recommended for connecting to control
center.
J. Install control wiring through 3/4" conduit connection as indicat-
ed on page 1. Leave lid off' terminal housing until operational
check is completed. Install breather tube on the outside of the ter-
minal box as shown on page 1, Make sure top of tube is at least
12" above the drainage water level. CAUTION: All conduit con-
nections to terminal housing must be sealed to prevent entry of
any water, water vapor or condensation into terminal housing.
Breather tube length may be cut to shorten height, or extended for
higher flood levels by using 3/8" compression tube coupling and
3/8" tubing, as desired between formed breather tube and elbow
fitting on side of terminal housing.
Blocks
AL1
AL2
AL3
BL1
BL2
BL3
CL1
CL2
CL3
H1
H2 H3 H1 H4
H4
240V
X1
G
Off - On
ISS
Control
1
5
5
5
6
6
2
6
7
3
7
7
8
8
8
4
Terminal
Terminal
Overtemp.
Block
Block
Control
1. Contactor "1 CON" and no fuses are supplied on single stage models.
NOTES:
2. Used on two stage models - fuses "3FU thru 8FU" - Contactor
"2 Con" - Time delay relay "1TDR" - Pilot light "3LT".
3. Used on three stage models - fuses "3FU thru 11FU" - Contactor
"2 Con & 3 Con" - Time delay relay "1TDR & 2TDR" - Pilot
lights "3LT and 4LT".
4. Termistor connections: Necessary Jumpers - Factory Wired
1 Heater
2 Heaters
5
Ground
OCC & WCC Control Center
H3
H2
H1
480V
4
Overtemp.
Probes
Non-Indicating
Temp. Control
Low Temp. Alarm
Contacts (Optional)
Temperature
Indicator (Optional)
3 Heaters