Operating instruction
Thermo™-Expansion Valve Series TIH
Emerson Climate Technologies GmbH
Date: 19.02.2020
Am Borsigturm 31 I 13507 Berlin I Germany
TIH_OI_EN_DE_FR_ES_IT_RU_0220_R05_865925.docx
G e n e r a l i nf o r ma t i o n :
TIH series of Thermo™-Expansion Valves are
designed for air conditioning, heat pumps and
commercial refrigeration applications. The TIH is ideal
for those applications requiring hermetic/ compact size
combined with stable and accurate control over wide
load and evaporating temperature ranges.
S a f e ty i n s tr u c t i o n s :
•
Read operating instructions thoroughly. Failure
to comply can result in device failure, system
damage or personal injury.
•
According to EN 13313 it is intended for use by
persons having the appropriate knowledge and
skill.
•
Before opening any system make sure pressure in
system is brought to and remains at atmospheric
pressure.
•
Do not release any refrigerant into the
atmosphere!
•
Do not exceed the specified maximum ratings for
pressure and temperature.
•
Do not use any other fluid media without prior
approval of EMERSON. Use of fluids not listed
could result in: Change of hazard category of
product and consequently change of conformity
assessment requirement for product in
accordance with European pressure equipment
directive 14/68/EU.
•
Ensure that design, installation and operation are
according to European and national
standards/regulations.
M o u n t i n g l o c a t i o n :
•
Valves may be installed in any position, but should
be located as close as possible to the distributor or
evaporator inlet.
•
Fig. 1 shows Heat pump application.
B r a z i ng : ( Fi g . 2 )
•
Perform and consider the brazing joint as per
EN 14324.
•
Before and after brazing clean tubing and brazing
joints.
•
To avoid oxidization, it is advised to purge the
system with an inert gas such as nitrogen while
brazing.
•
Do not exceed the max. body temperature of
120 C!
I n s t a l l a t i o n :
Warning: Do not bend capillary tube at
interface to head of valve. Allowed: distance N
(10 mm) and radius R (5 mm).
Fig. 3
•
Securely fasten the bulb with straps provided.
Insulate bulb with a suitable material. The location of
bulb on suction line is dependent to size of suction
line (see Fig. 4)
•
Be sure that the external equalizer line cannot siphon
oil from the suction line.
•
The expansion valve must be protected against all
contaminants. Install a filter drier before the valve.
•
Install a sight glass before the valve.
P r e s s ur e T e s t :
After completion of installation, a pressure test must be
carried out as follows:
-
according to EN 378 for systems which must
comply with European pressure equipment
directive14/68/EU.
-
to maximum working pressure of system for other
applications.
Warning:
•
Failure to do so could result in loss of refrigerant
and personal injury.
•
The pressure test must be conducted by skilled
persons with due respect regarding the danger
related to pressure.
L e a ka g e T e s t :
Conduct a tightness test according to EN 378-2 with
appropriate equipment and method to identify leakages
of external joints.
O p e r a t i o n :
Check for leaks, sufficient refrigerant charge and be
sure no flash gas is present before attempting to check
valve operation.
P r o pe r o p e r a ti o n o f c h a r g e s :
The maximum bulb temperature is limited to:
Charge Code
Charge Max. bulb Temperature
Z1/Z3, M1/M3,
N1/N3, C1/C3
MOP
+120°C
M0/M2, C0/C2
liquid
+100°C
N0/N2, B0/B2
liquid
+80°C
Warning:
Valves with gas charge feature MOP function and
operate properly only if the temperature at the bulb
is below the temperature at the head of the valve and
at the capillary tube (see Fig. 5). If valve head
becomes colder than the bulb, malfunction of the
expansion valve occurs (i.e. erratic low pressure or
excessive superheat).
F a c to r y se t t i n g s :
The table below provides the factory setting position of
superheat adjusting stem and shows the number of turns
clockwise when adjusting stem fully open
counterclockwise
Charge
Code
Number of
turns (360°)
Charge
Code
Number of
turns (360°)
Z1/Z3
+5.5
-
-
M1/M3
+2.5
M0/M2
+2.5
N1/N3
+5.5
N0/N2
+4.5
-
-
B0/B1
+3.5
C1/C3
+1.5
C0/C2
+3
TIH in systems with nonstandard refrigerants:
The following refrigerants can be used with standard
available charges when factory setting to be readjusted
for optimum superheat level. The readjustment depends
to operating evaporating temperature and it is as
guideline as follows:
Refrigerant Charge
code
Evaporating temperature (°C)
+5
0
-10 -20 -30
Number of turns
R32
Z1
-1
0
0
0
-
R452B
Z1
+2.5 +2.5 +2.5 +2.5
-
R454B
Z1
+3
+3
+3
+3
-
R450A
M0
+2.5 +2
+1 +0.5
-
R454C
N1
0
0
0
0
-
R454C
N0
+0.5 +0.5
0
-0.5
-
R1234YF
C1
0
0
0
+0.5
-
R1234YF
C0
0
0
0
+1
-
R454A
B0
-2
-2
-1 -0.5
0
R455A
B0
+1.5 +1.5 +1.5 +1.5 +1.5
Note: Change of static superheat will shift MOP point
in reverse direction.
Note2: TIH for R134a with MOP (M1) shall not be
used for R450A.
Warning: There are max. 12 turns on the
adjustment stem (from left stop to right stop). When
stop is reached, any further turning will damage the
valve.
S u p e r h e a t A d j u s t me n t :
If the superheat must be adjusted for the application
proceeds as follows:
1.
Remove seal cap from bottom of valve.
2.
Turn the adjustment screw clockwise to increase the
superheat and counterclockwise to decrease
superheat.
Changes in Superheat (K) per stem turn depending
on evaporating temperature and refrigerant:
Refrigerant
Evaporating temperature (°C)
-30
-20
-10
0
+5
R410A
1.3
1.0
0.8
0.6
0.5
R32
1.3
1.0
0.7
0.6
0.5
R452B
1.4
1.1
0.8
0.6
0.6
R454B
1.5
1.1
0.8
0.6
0.6
R407C
2.3
1.6
1.2
0.9
0.8
R448A
2.0
1.5
1.1
0.9
0.8
R449A
2.0
1.5
1.1
0.9
0.8
R134a
-
2.5
1.8
1.4
1.2
R513A
-
2.3
1.7
1.3
1.2
As much as 15 minutes are required for the system to
stabilize after the adjustment is made.
3.
Determine superheat “sh” according to Fig. 6.
4.
Replace and tighten seal cap (hand tight).
S e r v i c e / Ma i n t e na n c e :
Defective TIH must be replaced, they cannot be
repaired.
T e c h ni c a l D a ta :
Max. working pressure PS
46 bar
Factory test pressure PT
50.6 bar
Medium temperature TS
-40…+70°C
Dimensions
Fig. 8
Fig. 7
Note:
+ = Clockwise rotation
- = Counterclockwise rotation
