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General Information and Setup

Owner’s/Installation Manual for SMM

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Section 2: General Information and Setup

Load Management Options

Load  management  systems  are  designed  to  work
together to avoid a generator from being overloaded by
large appliance loads. Options include:

Smart Management Modules (SMMs)

Smart  A/C  Module  (SACM)—standard  in  single-
phase  100–800  amp  RTS  or  RXS  transfer
switches.

These options can be used in conjunction or separately.

Application Considerations

Generator overload condition is determined by generator
frequency. Loads are shed when frequency drops below
a preset value for a predetermined time.
A SMM can be used individually or in conjunction with a
SACM to manage a combined total of eight loads. 

SACM  inputs  1–4  have  fixed  priorities  of  1–4,
respectively. SMM’s can be individually set to prior-
ities 1–8.

To  reduce  loads  returned  to  the  generator  all  at
once, it is best to set SMM priorities to follow after
the  last  HVAC  load  has  returned. This  allows  the
generator  to  accept  loads  gradually,  reducing  the
potential for additional nuisance load shed events.

A SMM can share a priority with an A/C priority on
the SACM provided the generator is sized to han-
dle the combined surge load from both appliances. 

Sharing  priorities  can  allow  up  to  12  loads  to  be
managed in a correctly sized system.

In  any  combination  of  modules,  recovery  times  after  a
loss  of  utility  power  or  shutdown  due  to  overload  are
shown in 

Table 2-1

.

NOTE: 

For digital thermostats where a 24 VAC thermo-

stat wire is not available, a SMM must be used to break
the power at the HVAC load itself.

Smart Management Module (SMM)

Any  240V  loads  up  to  100A  (resistive,  90A  inductive),
including central air conditioners, can be managed using
a SMM. The system can accommodate up to eight indi-
vidual SMMs.

NOTE: 

SMMs  are  self-contained  and  have  individual

built-in controllers.

Table 2-1. Priority Settings

Priority

Recovery Time

SACM

SMM

1

5 minutes

Yes

Yes

2

5 minutes 15 seconds

Yes

Yes

3

5 minutes 30 seconds

Yes

Yes

4

5 minutes 45 seconds

Yes

Yes

5

6 minutes 

NA

Yes

6

6 minutes 15 seconds

NA

Yes

7

6 minutes 30 seconds

NA

Yes

8

6 minutes 45 seconds

NA

Yes

Summary of Contents for G007006-0

Page 1: ... GENERAC COM 1 888 GENERAC 1 888 436 3722 Para español visita http www generac com service support product support lookup Pour le français visiter http www generac com service support product support lookup 000209b WARNING Loss of life This product is not intended to be used in a critical life support application Failure to adhere to this warning could result in death or serious injury ...

Page 2: ...ii Owner s Installation Manual for SMM 000393a WARNING CANCER AND REPRODUCTIVE HARM www P65Warnings ca gov ...

Page 3: ...ns 3 Application Considerations 3 Smart Management Module SMM 3 SMM and Carton Contents 4 Setting Lockout 5 Jumper Locations 5 Section 3 Installation Tests and Troubleshooting Electrical Specifications 9 Enclosure Specifications 9 Remove Contents from Carton 9 Tools Needed For Installation 9 Mounting Instructions 9 Connections 10 Setting Priorities 11 Tests 11 Utility Test 11 Installation Summary ...

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Page 5: ...ifically recommend verify that it is safe for others and does not render the equipment unsafe Throughout this publication and on tags and decals affixed to the unit DANGER WARNING CAUTION and NOTE blocks are used to alert personnel to special instructions about a particular operation that may be haz ardous if performed incorrectly or carelessly Observe them carefully Alert definitions are as follo...

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Page 7: ... This allows the generator to accept loads gradually reducing the potential for additional nuisance load shed events A SMM can share a priority with an A C priority on the SACM provided the generator is sized to han dle the combined surge load from both appliances Sharing priorities can allow up to 12 loads to be managed in a correctly sized system In any combination of modules recovery times afte...

Page 8: ... Switch positions are LOCKOUT LOAD ON GENER ATOR enabled and LOCKOUT DISABLED See Table 2 2 NOTE Recovery time is based on priority dial settings See Table 2 1 Test Button C Disables contactor output for a speci fied time LED D Provides module status See Table 2 3 Contactor E Normally OPEN If generator begins to overload the contactor opens to take load off generator power See Connections Mounting...

Page 9: ...ram 3 Frequency Jumper 4 Mode Selector Jumper identified on control board as Lock Out Jumper The frequency jumper is factory set at the 60 Hz position The mode selector jumper is factory set at position A which is considered standard for most installations Jumpers should remain in place except when operating the unit under either or both of the following conditions Operating the unit at 50 Hz requ...

Page 10: ...ower up for five minutes of initial operation Lockout 30 minutes 3 second flash 3 On 3 Off Generator Module detected an overload while trying to recover from a shed situation Operation is disabled for 30 minutes This state only occurs in generator mode Lockout Switch Active 6 second flash 6 On 6 Off Generator Module output is disabled and there is no power to the appliance while in generator mode ...

Page 11: ...t the l oad Module now in lockout recovery NO YES Have load shed recovery time a nd module priority time elapsed 1 YES NO Was lockout recovery operation successful YES NO YES NO Notes 1 Refer to the Priority Settings table for information on recovery priority times 2 If the module detects a generator overload during a load shed recovery the module will again shed the load for up to 30 minutes Load...

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Page 13: ... of inaccurate ghost voltage readings also known as phantom voltage or stray voltage readings See DMM manufacturer s liter ature for additional information Mounting Instructions Recommended installation is near the electrical panel or appliance load The enclosure has a NEMA 3R rating and can be mounted indoors or outdoors It provides a degree of protection against rain and sleet and is undamaged b...

Page 14: ...e at least 167 F 75 C rated wire and gauge per installation instructions See Table 3 1 for recom mended wire size based on load current Height in mm H1 7 0 178 5 H2 2 4 61 0 Width in mm W1 11 4 289 4 W2 7 8 200 0 Depth in mm D1 5 3 136 9 W1 W2 H2 H1 D1 009113 Legend A Red 240 VAC Line B Black 240 VAC Line C Red 240 VAC Load D Black 240 VAC Load E White Neutral as required F Green Ground as require...

Page 15: ...figuration is shown below Configurations will vary depending on customer prioritization of loads 1 Set the priority of each SMM as desired using the example configuration for reference 2 Apply priority decal in a suitable location on electri cal panel to record chosen priority designations 3 Record priorities on decal Tests Utility Test 1 Turn utility power ON and enable all module feed ing circui...

Page 16: ...d occurred Wait five minutes plus the priority time delay see Table 2 1 for unit to enable output Load not powered LED flashing 3 second interval This load overloaded the generator while attempting recovery from a shed It is in a 30 minute lockout wait period Wait 30 minutes from lockout for unit to attempt to re apply load Review all loads enabled in household The genera tor may experience anothe...

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Page 20: ...rights reserved Specifications are subject to change without notice No reproduction allowed in any form without prior written consent from Generac Power Systems Inc Generac Power Systems Inc S45 W29290 Hwy 59 Waukesha WI 53189 1 888 GENERAC 1 888 436 3722 www generac com ...

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