nVent HOFFMAN DAHHL801AC 80W Hazardous Location Heaters Instruction Manual
- June 13, 2024
- nVent HOFFMAN
Table of Contents
Hazardous Location Heaters
50W and 80W Models
INSTRUCTION MANUAL
DAHHL801AC 80W Hazardous Location Heaters
NOTE: The respective operating instructions must be observed. For EC Type Examination Certificate PTB 02 ATEX 1116X and IEC Scheme Certificate IECEX PTB 07.0055X, see nVent.com/HOFFMAN.
APPLICATION
The self-limiting, electric-conduction heater is designed to be attached
directly to manifolds, measuring instruments, control valves and similar
equipment installed in hazardous areas. It heats the device by heat
conduction. This is the easiest, safest and most economical method of freeze
protection or temperature maintenance.
A conduction heater requires considerably less power than a finned convection
heater, as the heat conducting qualities of metal are much better than those
of air. The air surrounding the whole installation in the enclosure serves as
additional insulation.
The PTC (Positive Temperature Coefficient) cartridges automatically increase
their resistance as the heater block temperature increases. Higher resistance
results in lower heating power. The heating power is very low at high
temperatures so that the temperature cannot exceed the maximum temperature of
the respective temperature class. The estimated heat output is reflected in
the graph; see Figure 1.
PERFORMANCE CURVE
TECHNICAL DATA
DESIGN DATA
| DAHHL501 AC| DAHHL801 AC
---|---|---
Rated voltage| 100 – 265 VAC OR VDC| 100 – 265 VAC OR VDC
Maximum Rated Current (Amps) (acc. to DIN VDE 0298)| 10| 10
Nominal power [W]| 50| 80
Temperature class| T4| T3
Ambient temperature| -76 to +140 F
(-60 to +60 C)| -76 to +140 F
(-60 to +60 C)
Maximum permissible operating temperature range at normal rating| -76 to +302
F
(-60 to +150 C)| -76 to +302 F
(-60 to +150 C)
Connection cable| 39 (1 m) long silicone cable, notch and oil resistant,
3x AWG16;
∅ 0.37 (9.4mm)| 39 (1 m) long silicone cable, notch and oil resistant,
3x AWG16;
∅ 0.37 (9.4mm)
Conduit connection| 1/2 NPT| 1/2 NPT
Ingress Protection| IP66 / IP68
(1bar/30min)| IP66 / IP68
(1bar/30min)
Material| seawater-proof aluminium, black
anodized| seawater-proof aluminium, black
anodized
Length (in./mm)| 3.5 (90)| 3.5 (90)
Width (in./mm)| 1.6 (40)| 1.6 (40)
Depth (in./mm)| 1.2 (30)| 1.2 (30)
Weight (lb./g)| 1.1 (28)| 1.1 (28)
EXPLOSION PROTECTION
| SL BLOCKTHERM
---|---
Manufacturer| INTERTEC-Hess
CSA Certificate| 1655545 (LR43674)
CSA Type of Protection| CI. I, Grp. ABCD T4/1-3
Cl. II Grp. EFG
IEC Scheme Certificate| IECEx PTB 07.0055X
EC Type Examination Certificate| PTB 02 ATEX 1116 X
Marking| II 2 G Ex d IIC T4/T3
112 D Ex tD A21 IP65, T200 C
INSTALLATION INSTRUCTIONS
The block heater dissipates the heat by conduction. Mount the heater block directly to a flat conductive (e.g. metal) surface of the device to be heated. One bolt through the middle hole is sufficient to mount the heater, though more may be used. Heaters are equipped with a ground terminal. Use a cable gland or a ½ NPT conduit depending on the application. Be careful not to bend or exert any load on the connection cable during unpacking and transport.
Note: The absolute heat transfer coefficient of the surrounding enclosure
must not be smaller than 0.5 W / °C.
Be sure to comply with the permissible operating temperature range. Before
entering the customer-supplied Ex junction box, the connection cable must be
firmly installed observing the permissible bending radius of 5 times the
outside cable diameter. In dust-hazardous areas, the applicable requirements
of the EN 60079-14 have to be observed.
CAUTION! Remove the RED protection cap only for ½ NPT conduit
installation. Never remove the adapter.
The heater must only be connected and secured by certified technical personnel
in accordance with the label specifications, rated voltage and rated current:
If operating voltage equals rated voltage, the heater will generate the
specified nominal output, with an allowance to voltage fluctuations of up to10
%. Circuit breakers suitable for up to 16 amps can be used for short circuit
and line protection.
A ground terminal is provided for the purpose of ensuring potential
equalization. The terminal is marked as such. In a TT or TN system, a residual
current operated protective device (RCD) must be used with a rated response
fault current not exceeding 100 mA. Residual current devices with a rated
response fault current of 30 mA are preferred.
Installing for an IT system application, an insulation monitor must be used
that switches off the power supply as soon as the insulation resistance falls
to 50 ohms per volt of the rated voltage or lower (see DIN EN 60079-14:2008;
section 7.4).
DETAIL DRAWING
OPERATION
Turn on the heater once properly installed. The startup current may be 3 to 5 times greater than the nominal current during the first 1 to 2 seconds after powering on. The heating output may deviate up to 15% from the specified values.
WIRING DIAGRAM
MAINTENANCE
The heater requires no maintenance.
Performance and safety tests can be conducted at intervals as determined by
the operator in compliance with current regulations.
Repairs must only be done by the manufacturer. In dust hazardous areas,
applicable requirements of EN 60079-17 and EN 60079-19 must be observed.
SAFETY INSTRUCTIONS
Installation of the heater in an exposed position involves a certain risk of injury. The ends of the fins and hot surfaces can pose a risk of injuries.
- Maximum 160 C (320 F) with T3 heaters
- Maximum 100 C (212 F) with T4 heaters
CE DECLARATION OF CONFORMITY
EU Declaration of Conformity
INTERTEC Hess GmbH
Raffineriestraße 8
93 333 Neustadt / Donau
INTERTEC Hess GmbH,
declare under our sole responsibility that the product
SL VARITHERM … ,
SL SLIMTHERM … ,
SL DSETHERM … ,
SL QUADRATHERM…
to which this declaration relates is in accordance with the provision of the following directives
EN IEC 60079-0:2012+A11:2013 EN IEC 60079-1:2014 EN IEC 60079-31:2014
EN IEC 60529:1991+A1:2000+A2:2013 EN IEC 61000-6-4:2007+A1:2011
Marking
0102
II 2 G Ex db IIC T6, T5, T4, T3
II 2 D Ex tb IIIC T85°C, T100°C, T135°C, T200°C
Degree of protection IP66/ IP68 1bar/ 30min
PTB 02 ATEX 1116 X
Neustadt, den 24.05.2018
Dipl.-Ing. Martin Hess
Geschäftsführer
WARRANTY
nVent Equipment Protection warrants that the Goods manufactured by nVent Equipment Protection will be free from defects in material and workmanship for a period of one (1) year from the date of shipment by nVent Equipment Protection, subject to the following conditions and exclusions:
A. Conditions. All Goods must be installed and operated according to the following specifications:
- Maximum voltage variation no greater than plus or minus 10% of nameplate nominal rating;
- Maximum frequency variation no greater than plus or minus 3 Hz of nameplate nominal rating;
- Must not exceed minimum and maximum stated temperatures on the nameplate;
- Must not exceed (BTU/Hr) rating, including any heat sink as indicated on the nameplate;
- Refrigerant bearing Goods must not be restarted for a period of one (1) minute after intentional or accidental shut-off;
- The filters (if applicable) must be cleaned regularly;
- The Goods and any parts thereof must not be modified, unless prior written authorization is received from nVent Equipment Protection; and
- All Goods must be installed and grounded in accordance with all relevant electrical and safety codes, as well as the National Electric Code and OSHA rules and regulations.
- All Goods must be installed in a stationery application, free of vibration.
A violation of any one of these conditions shall render the warranty hereunder void and of no effect.
B. Exclusions. This warranty shall be void if product is misapplied in any way or:
- Buyer specified product is inappropriate for system or environment in which it is operating.
- Goods are not installed in accordance with nVent Equipment Protection specifications.
- Removal or modification of nVent Equipment Protection label affixed to product without written nVent Equipment Protection approval.
nVent Equipment Protection must be notified of a claim in writing not later
than fourteen (14) days from the date when Buyer has become aware of such
occurrence, or where the defect is such that it may cause damage, immediately,
such notice containing a description of how the defect manifests itself.
Failure to provide such prompt notice to nVent Equipment Protection shall
result in forfeiture of Buyer’s rights under this warranty.
In the event of a warranty claim, Buyer is to return defective goods to nVent
Equipment Protection in accordance with nVent Equipment Protection Return
Policy. Warranty period for repaired goods remains at 1 year from shipment of
original goods. nVent Equipment Protection sole obligation to Buyer under this
warranty will be, at nVent Equipment Protection option:
C. Repair or replace nVent Equipment Protection products or parts found to be
defective in material or workmanship.
D. Issue credit for the purchase price paid by Buyer relating to such
defective Goods or part.
THIS WARRANTY CONSTITUTES THE ENTIRE WARRANTY WITH RESPECT TO THE GOODS AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY AND IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
RETURN AND REPAIR POLICY
nVent Equipment Protection products that: (i) are made to order, (ii) have
been modified by Buyer, (ii) have special finishes, or (iv) are determined by
nVent Equipment Protection to constitute “custom” products that cannot be
returned to stock or resold to other Buyers, will not be accepted for return
by nVent Equipment Protection.
All returns require a Return Material Authorization number (RMA #), regardless
of reason for return, whether it be for warranty or out of warranty repair.
Returns without an RMA # will be refused by our Receiving Department. An RMA #
is valid for 30 days.
E. An RMA # will be issued by our Product Return Department in Anoka, MN at 763-422-2211. Buyer should have following information available at time of RMA request:
- Complete Model Number, Serial Number and description of damaged unit being returned.
- Original Buyer Purchase Order number and date product was received by Buyer.
- Quantity to be returned and a brief description of failure for each unit, if different.
- Contact information of Buyer that must include: name of company, billing and shipping address, phone, number, fax number, freight carrier and the name and phone number of a Buyer contact who can elaborate on the claimed defect in detail.
- Buyer must provide a Repair Purchase Order number for both warranty and out of warranty repairs. The PO will not exceed 50% of a new unit. Buyer will be notified of repair charges that exceed approved PO amount.
F. All returns to nVent Equipment Protection must be securely packed, using
original cartons if possible. All returns must have the RMA number visible on
the outside of the carton. nVent Equipment Protection is not responsible for
material damaged in transit. Any refrigerantbearing Goods must be shipped
upright for return.
G. Shipping cost for all non-warranty repairs is the responsibility of the
sender and must be shipped prepaid. Shipping costs for all warranty related
repairs will be covered by nVent Equipment Protection provided the goods are
returned using a nVent Equipment Protection approved carrier. If after
diagnoses the product is determined by nVent Equipment Protection not be
covered under warranty, Buyer will be responsible for all shipping charges and
will be billed accordingly.
H. Non-warranty repairs are subject to a $105 minimum analysis fee. If
approval is not received within 30 days, material will be scrapped and all
shipping expenses and corresponding analysis fees will be billed to Buyer.
I. At Buyer’s request, Failure Analysis can be provided by nVent Equipment
Protection for warrantable goods at no charge. Failure analysis for non-
warranty repairs are subject to a $150 per hour Engineering charge plus any
other incurred testing costs.
J. All returned merchandise must be sent to the following address: nVent
Equipment Protection, 2100 Hoffman Way, Anoka, MN 55303-1745.
K. Credit for accepted returns shall be at the original selling price or the
current selling price, whichever is lower, less the restocking charge
indicated as follows:
- Within 60 days of invoice date – 20% of applicable selling price.
- Within 61-120 days of invoice date – 30% of applicable selling price.
- Within 121-180 days of invoice date – 40% of applicable selling price.
- Beyond 180 days – subject to individual review by nVent Equipment Protection.
If product being returned for credit requires repair or modification, the cost of any labor or material necessary to bring product into saleable condition will be deducted from credit. Buyer may not take credit against returns without prior written nVent Equipment Protection approval.
LIMITATION OF LIABILITY
NVENT EQUIPMENT PROTECTION WILL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR ANY
INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION ANY
LOST PROFITS OR LABOR COSTS, ARISING FROM THE SALE, USE OR INSTALLATION OF THE
GOODS, FROM THE GOODS BEING INCORPORATED INTO OR BECOMING A COMPONENT OF
ANOTHER PRODUCT, FROM ANY BREACH OF THIS AGREEMENT OR FROM ANY OTHER CAUSE
WHATSOEVER, WHETHER BASED ON WARRANTY (EXPRESSED OR IMPLIED) OR OTHERWISE
BASED ON CONTRACT, OR ON TORT OR OTHER THEORY OF LIABILITY, AND REGARDLESS OF
ANY ADVICE OR REPRESENTATIONS THAT MAY HAVE BEEN RENDERED BY NVENT EQUIPMENT
PROTECTION CONCERNING THE SALE, USE OR INSTALLATION OF THE GOODS.
nVent
2100 Hoffman Way
Anoka, MN 55303 USA
+1.763.422.2211
+1.763.576.3200
nVent.com
Rev. | © 2018 nVent
P/N 89115888, 89115887
References
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